Monitoring & Digital

    Water Quality Testing

    Find the right water quality testing partner for your project. Aguato connects procurement teams, project engineers, and sustainability managers with verified providers worldwide. Browse the listings below, or post your project to receive tailored proposals directly from matched suppliers.

    22 providers

    This page is a good fit if you need:

    • Filtration or Activated Carbon capabilities
    • Suppliers with utilities sector experience
    • Providers operating in United Kingdom or Netherlands
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    3rd Light Media Ltd logo

    3rd Light Media Ltd

    United Kingdom

    3rd Light Media provide technical documentation and design services for water and wastewater projects, both in the UK and internationally. We provide a range of documentation for projects, helping clients achieve their handover requirements and producing high quality documents which provide the end users with the information they need to operate and maintain the plants. We are a market leader in driving digital innovative solutions to our clients to ensure documentation is presented in new and dynamic ways, this includes development of web-based O&M manuals which can integrate with client I.T. systems such as SharePoint; Graphical design to enable data and documentation of assets on a site plan or P&ID to be available within just a few clicks of a button. Additionally, we have developed a QR coded asset tagging system and mobile App. Our services mean we can provide our clients with a single source for all handover documentation requirements. The services we can provide include: Operating and Maintenance Manuals (O&Ms) Site Operating Manual (SOM) Health & Safety Files Asset Data Registration Training Manuals Site Drawings (P&IDs, Process Flows, Site Layouts and Plans, GA’s, Single Line Diagrams and more) AutoCAD Drafting Services Additionally, we also provide a range of onsite services to further enhance being a one stop provider for all your project handover needs. Some of the onsite services we provide include: Asset Identification Tags (to meet all individual client specifications) Pipe Banding to BS1710 Site signage and labelling We also provide a range of design and pre-construction services, with experience when working with Tier 1 contractors at ECI / Outline Design stages of projects including: Functional Design Specifications Control Philosophies Factory Acceptance & Site Acceptance Tests for Software Testing Commissioning Plans and Sequencing Asset Condition Reports Verification Survey Works (Producing P&IDs, ICA and Electrical Design Proposals) We work as an integrated team with both contractors and clients to ensure all aspects of project handover are achieved to the highest standard. We are able to do this with our vast knowledge of individual water companies asset standards and specifications. We are also experienced in using portals such as TWEXnet, Asite, Aconex, Business Collaborator and Conject for uploading documents. Our team comprises of skilled and experienced site and process engineers with a vast knowledge of both water and wastewater treatment systems. Our team of engineers all hold EUSR Water Hygiene and CSCS cards as well as water company specific requirements such as the Thames Water Safety Passport. We also have an in-house graphic design team providing professionally drawn illustrations and drawings which are used within our documentation, helping to visualise written descriptions and processes. Our philosophy is to take the burden of producing documentation on projects away from our clients. Being skilled process engineers, we will visit sites to gather information and we work with your supply chain to coordinate the availability of all required documents and drawings, ensuring compliance with the end clients standards. We write all the technical content and detail to the highest standard, supported by expertly drawn diagrams and illustrations. Some of the water companies we have worked with include: Thames Water Affinity Water Yorkshire Water Southern Water Severn Trent South East Water United Utilities Welsh Water Bristol Water Essex & Suffolk Water Irish Water Haya Water We work both directly with water companies and Tier 1 and Tier 2 contractors. We work on projects of all sizes, from minor schemes to major £100+ million projects.

    Treatment Works Products/Services
    Accreditations
    ABC Stainless Ltd logo

    ABC Stainless Ltd

    United Kingdom

    ABC Stainless Ltd (formed in 1981) are a specialist stainless steel company, offering a full range of services including design, manufacture, supply, installation and commissioning to main contractors and Water Authorities, in the Water Industry. We supply a diverse range of stainless steel products to both WTW and WwTW, including our unique ‘Weldless Collar Pipe System’. This system minimises site fabrication and attendance, supplying prefabricated pipe spools for installation. We welcome enquiries relating to both sheet, plate & tube in all grades of stainless steel including exotic and aluminum, manufacturing stainless steel pipework systems (metric, schedule, dairy etc.), biogas systems, hygienic tanks, pressure & vacuum vessels, platforms, launders, pen stocks, screens, skid process units, weirs etc. DWI Approval We have ISO 9001:2008 accreditation and Drinking Water Inspectorate (DWI 56.4.516) manufacturing approval for our ‘Weldless Collar Pipe System’, and ABC Storage, Process Tanks & Vessels, this is under regulation 31(4)(a) of the Water Supply (Water Quality) regulations 2000 No.3184 & the Water Supply (Water Quality) regulations 2001(Wales) No.3911. In all cases, products are manufactured specifically for each project after full discussion with our clients and our own design office. We offer a full design & draughting service using the latest 3D modelling software. Material certification, quality plans, procedures, employee certification and testing are available upon request, with third party Insurer witness testing where required. We offer a range of material finishes including bead blast, bright (mirror) polished, satine (brushed) polished and 2B.

    Renewables & Energy Management
    Accreditations
    ACWA Services Ltd logo

    ACWA Services Ltd

    United Kingdom

    ACWA is one of the leading UK players delivering innovative sustainable process solutions and technologies for both municipal and industrial clean water, wastewater and bio-solids treatment. ACWA design and execute resilient cost-effective technologies which address the needs of our clients and their regulatory drivers whilst helping to address climate change. ACWA provides expert technical products and services to the water, wastewater and industrial sectors. Our expertise combines practical experience with academic knowledge across a wide range of specialisms. These include: Design and build (digital delivery and off-site manufacture) Commissioning Project management We apply our extensive expertise to help our clients find the best sustainable, cost-effective solutions that meet all their requirements. We serve our wholesale water, wastewater and biosolids markets plus industrial food and beverage clients with their water needs. Our primary specialist areas are: Water treatment Wastewater treatment Industrial effluent Food and beverage TECHNOLOGIES In finding the best solutions we look at innovative ideas and turn them into reality producing some of the most sustainable technological solutions on the market. Our technologies include: Nitreat® Ion Exchange: This is a reversible nitrate removal process by which ions are interchanged between a solid and a liquid with no substantial structural changes in the solid. AquaPyr™ Tertiary Solids Removal Filter: This process is a simple filter that can also remove phosphorous using innovative cleaning technology producing low waste and using less power than other filters. Amtreat® High Rate Ammonia Removal: This process is a high-rate activated sludge process designed to treat wastewater streams and sludge liquors containing high concentrations of ammonia. DESIGN & BUILD ACWA’s in-house design capability is the architecture on which each project is meticulously built. The latest 3D models create precision imaging of all types of installations from a complex water or effluent treatment plan to a single piece of equipment to be integrated into an existing system. Through in-house engineers ACWA deliver a complete range of technical design and build expertise across projects and programmes of work that include, civil, mechanical, process and electrical, instrumentation and control and automation. PROJECT MANAGEMENT ACWA’s team of highly-experienced project managers, engineers and technicians work closely with clients and key project team members to deliver solutions in an efficient, timely, cost-effective and environmentally-responsible manner. Project management includes ensuring complete compliance with all relevant regulations, both European, national and where relevant, international, while at all times maintaining a clear focus on the project remit. Our responsibility is to ensure each project is a complete success, both for our client and for the environment. We actively identify and manage risks, issues, changes to requirements and quality standards to guarantee the best possible outcome. COMMISSIONING For hands-on commissioning services, ACWA is an industry leader, focussed on complex water and wastewater facilities for municipal and industrial clients. Commissioning is an essential step in project delivery. Without it we cannot have assurance of a quality outcome. Our in-house team provides comprehensive commissioning services getting involved at project start-up to take the project through planning design, construction and turnover, on time and on budget. ACWA’s multi-disciplined knowledge and expertise includes, system design, electrical testing, operations and maintenance (incl. training) as well as systems and process diagnostics, providing an authoritative and effective resource. WATER TREATMENT Our water expertise comprehensively covers the filtration spectrum from conventional strainers and filtration systems to the most advanced reverse osmosis and ion exchange technologies. Microfiltration Ultrafiltration Nanofiltration Reverse Osmosis / Desalination Ion Exchange Conventional Water Treatment Pressure Filters Gravity Filters Chemical Treatment Granular Activated Carbon WASTEWATER TREATMENT The days of wastewater disposal by methods that had no consideration for the implications to the environment are over. As water scarcity increases and the pressure to comply with ever increasing environmental legislation for effective effluent treatment intensifies, it has never been more important to choose the right wastewater partner who can provide a range of effective processes. ACWA can deliver those solutions. Preliminary Treatment Aerobic Biological Treatment Anaerobic Treatment Membrane Bio Reactor High-Rate Ammonia Removal (Amtreat®) Scrubber Effluent Treatment Plant Effluent Re-use Tertiary Treatment Sludge Treatment

    Designers
    Enisca Ltd logo

    Enisca Ltd

    United Kingdom

    Enisca is a multi-disciplinary design, engineering and construction business operating in the power and environmental sectors delivering innovative, sustainable and quality solutions for public and private sector clients in these markets. Enisca has developed and maintained strong partnerships and collaborative relationships in our industry. Our focus on safety, our customers’ needs, programme, cost and the efficiency of project delivery support our key objective of ensuring high levels of customer satisfaction. Design and construct Our experienced and skilled engineering teams work in partnership with our clients and related stakeholders from an optioneering stage through the cycle of design, construction, commissioning, training and handover to the aftercare of asset operation and maintenance. Process & MEICA design services. Feasibility ctudies and cite surveys. Carbon/energy and whole life cost assessment. Water treatment and pumping. Wastewater treatment and pumping. Industrial effluent treatment. Process plant and controls. Turnkey mechanical and electrical installation. Commissioning and training Our experienced skilled commissioning engineers (process, mechanical and electrical/control systems) endeavour to provide clients with a seamless, trouble free handover of completed projects from pre-commissioning through to process proving and training of operators. Power, control and automation Enisca Automation is the motor control centre and control systems integration division of Enisca. Enisca Automation provides a range of power distribution, control and automation solutions to a range of public, commercial and industrial clients. The Automation Division is TickIT accredited and our engineers work in partnership with our clients through the cycle of design, manufacture, commissioning, training and handover. Enisca Automation aftercare provision includes planned maintenance and service with emergency callout. MCC manufactured solutions to Form 2 and Form 4. ICA, SCADA, HMI and systems integration. G5/4 harmonic studies and reports. Power factor correction and surge protection. Thermographic surveys. Certified Profibus design and installation. Enisca Automation customers include a range of engineering & building services contractors, commercial and industrial business clients. Utilizing fully automated design, materials management, assembly and testing processes Enisca can supply product in compliance with the rigorous standards set out in BS EN 60439-1:1999 for low voltage switchgear and control gear assemblies, all products are fully CE certified. Process plant The in-house capabilities of our business set us apart. With the process, civil, mechanical, electrical and chemical engineering skills of our people we design and construct turnkey water and wastewater treatment and pumping solutions. In-house we design and manufacture water and wastewater process plant that can be incorporated into overall solutions. Our Power, Control and Automation Division designs, builds and commissions the motor control centres, automation software and SCADA systems that control our plants. Package treatment plants – Wastewater treatment for municipal and industrial applications. Package treatment plants – Potable water applications. Process plant manufacture. Screens. Scraper bridges. Picket fence thickeners. Package DAF plants. Package pumping stations and booster sets. Chemical dosing plants. Stormwater attenuation and pumping. Sampling and recording. Operation and maintenance Our operations and service engineers provide operation, maintenance, service and callout support. We have a strong, resourceful team to manage utility and industrial process plant installations. The Enisca Automation aftercare provision, includes planned maintenance and service with emergency callout.

    Networks - Water Supply
    Contractors
    iNPIPE PRODUCTSâ„¢ logo

    iNPIPE PRODUCTSâ„¢

    United Kingdom

    For over 40 years, iNPIPE PRODUCTS™ has been an acknowledged world leader in the design, manufacture, and supply of advanced pipeline pigging products and services. Our expertise extends across a wide range of industries, with tailored solutions for water pipelines, including pig launching/receiving systems, pig handling equipment, bespoke cleaning and inspection tools, and pig tracking technologies. Our dedicated manufacturing and testing site can produce cleaning tools up to 3000mm in diameter. Our cutting-edge pipeline cleaning and inspection solutions ensure maximum asset integrity while promoting environmental sustainability. iNPIPE PRODUCTS™ offers a more eco-friendly alternative to traditional methods, reducing waste and emissions, while achieving the highest standards of pipeline cleanliness. Clean pipelines enhance performance, protect capital investments, and minimises operational downtime—all while reducing environmental impacts. With extensive engineering expertise and integrated manufacturing capabilities, we deliver custom-engineered turnkey solutions that meet the most demanding client requirements. Our Services Include: Tailored engineering solutions and expert consultancy Bespoke design, manufacturing and supply of pipeline tools Full project management and on-site technical support Advanced cleaning, inspection and maintenance services Visual inspection of pipeline interiors Debris mapping for internal condition analysis Validation of pipeline cleaning regimes for optimal performance Our SMART Pigging solutions offer industry-leading pipeline inspection capabilities that ensure maximum flow assurance and comprehensive asset integrity; utilising advanced technologies like the PHOENIX Debris Mapping Tool and Camera Integrated Pig for pipeline assessment, joint inspection and crossing validation prior to slip-lining. Trusted by global operators, iNPIPE PRODUCTS™ is committed to quality, safety and sustainability, with ISO 9001, ISO 45001 and ISO 14001 certifications. We are proud to be RoSPA Health & Safety Award winners for seven consecutive years, achieving the Gold Medal in 2024.

    Mapping & Modelling
    Accreditations
    Roperhurst Limited logo

    Roperhurst Limited

    United Kingdom

    Roperhurst: a UK in-house designer, manufacturer and installer of fume and odour control treatment plant and equipment, chemical storage vessels, dosing and delivery systems. Since 1976 Roperhurst has worked with a range of customers, big and small, global and local, on specialist plastic and environmental engineering projects. Roperhurst is quality certified to ISO9001:2015, SSIP approved and a long-standing member of BESA. Fume/odour: Roperhurst delivers a comprehensive proven range of solutions including catalytic iron filters, carbon absorbers, bio-filters, bio-scrubbers, biogas and chemical scrubbers. Utilising either organic or synthetic media filled units, all designed and built at our UK manufacturing facility, and each offering a green, smart and simple-to-operate solution to your fume, odour and VOC problems. Chemical storage/dosing/delivery: Roperhurst offers bespoke tanks and vessels for the safe long-term storage of chemicals, each specifically matched to meet your individual needs. Additionally, we fabricate and install dosing cabinets and day tanks with dual containment delivery pipework, all designed to dispense chemicals safely to the point of consumption. Delivery ductwork: Plastic ductwork for dealing with fume/odours created by chemical, biological or radiological processes have a high level of inherent risk.  This means that you need assurance that the ductwork will be fabricated correctly and installed competently. The UK standard for fabrication and installation of plastic ductwork is DW154, published by BESA, the Building Engineering Services Association (formerly HVCA).  Roperhurst is a UK market leader in this field: Roperhurst’s founder, Graham Handley, chaired the HVCA committee that wrote the 1st edition of DW154 in 2000. Roperhurst continues to work closely with BESA to improve standards. Roperhurst, as a BESA plastic ductwork specialist, ensures that our manufacturing and site work is regularly audited by external specialists to ensure that our work meets all current standards. Roperhurst is one of the few plastic ductwork specialists with its own in-house fibreglass division and specialist installation and testing teams. At Roperhurst we don’t need to rely on sub-contractors to produce elements of the project, which can be a cause of quality and compliance issues. Our plastics fabricator welders are time served and certified to BS EN 13067, and our laminators have been assessed under BS 4994.

    Designers

    Water Quality Testing: Regulatory Sampling, Analytical Methods, and UKAS Accreditation

    Water quality testing encompasses sampling, analysis, and interpretation of physical, chemical, microbiological, and radiological parameters to determine compliance with regulatory standards and assess treatment performance. In the UK, drinking water quality testing requirements are set by the Water Supply (Water Quality) Regulations 2016 (England) and equivalent Welsh, Scottish, and Northern Irish regulations implementing the EU Drinking Water Directive 98/83/EC (now superseded by DWD 2020/2184, UK transposition ongoing). Regulatory sampling: water companies must sample at prescribed frequencies (proportional to supply zone population) from service reservoirs, distribution network points, and consumer taps; samples analysed in UKAS-accredited laboratories (ISO/IEC 17025:2017 accreditation) using approved methods; results submitted to DWI annually and as required following compliance failures. Key monitoring parameters: microbiological (E. coli, total coliforms, Enterococci per EN ISO 9308-1/-2; Clostridium perfringens, Cryptosporidium for surface water supplies); physicochemical (pH, turbidity, conductivity, colour, taste, odour); chemical (metals: lead, arsenic, nitrate, nitrite, fluoride, pesticides, THMs, PAHs, copper, manganese, iron, PFAS from 2026).

    Analytical methods for water quality testing: microbiological analysis requires sample integrity (appropriate bottle: sterile glass or plastic with sodium thiosulphate preservative for chlorinated water, maximum 24 to 48 hours to analysis at 4 to 8 degrees C transport); E. coli and total coliforms by membrane filtration (EN ISO 9308-1, m-TEC, Colilert IDEXX - both approved by DWI); Cryptosporidium by US EPA Method 1623.1 (immunomagnetic separation, IMS, and immunofluorescence, direct fluorescent antibody, DFA); Legionella by culture (ISO 11731:2017) or qPCR (ISO 12869:2019) - culture is still reference method for risk management. Chemical analysis: inductively coupled plasma mass spectrometry (ICP-MS, ISO 17294-2) for metals at ug/L to ng/L concentrations; gas chromatography-mass spectrometry (GC-MS, EN 14752) for volatile and semi-volatile organics (THMs, PAHs, pesticides); ion chromatography (IC, ISO 10304-1) for anions (nitrate, sulphate, chloride, fluoride); total organic carbon (TOC, EN 1484) by combustion-IR; PFAS by EPA Method 533 or 537.1 (LC-MS/MS, detection limit 0.1 to 1 ng/L).

    UKAS accreditation (United Kingdom Accreditation Service, ISO/IEC 17025) is mandatory for laboratories analysing water samples for regulatory compliance purposes (DWI requirement; EA environmental monitoring framework). Accreditation covers: test methods (specific analytical methods must be individually accredited); equipment calibration and maintenance; staff competence; quality management system; proficiency testing (participation in inter-laboratory comparison schemes: Environment Agency CONTEST scheme for drinking water, RQAP for environmental water). Environmental water monitoring (rivers, lakes, groundwater) is regulated under the Water Framework Directive (UK WFD post-Brexit) with chemical and ecological status monitoring by the EA (England), NRW (Wales), SEPA (Scotland). EA National Laboratory Services (NLS, previously Starcross and Briston labs) provides reference analysis; major commercial UKAS-accredited laboratories include Eurofins, Socotec, Bureau Veritas, SGS, RPS, and Microbiology Solutions. On-site and online monitoring: online analysers (turbidity, pH, dissolved oxygen, free chlorine, conductivity, TOC) provide real-time process control data; not used for regulatory compliance which requires discrete grab or composite samples analysed in accredited labs per approved methods.

    Frequently Asked Questions

    How often must drinking water be tested in the UK?

    UK drinking water testing frequencies are specified in the Water Supply (Water Quality) Regulations 2016 (England), with equivalent Welsh, Scottish, and NI regulations. Frequency is proportional to the volume of water supplied or population served: (1) Microbiological (E. coli, total coliforms): minimum 1 sample per 100 m3/day supplied (or part thereof); for a 10,000 m3/day supply zone: minimum 100 samples/year from distribution network points and consumers; service reservoir: 1 sample per week; (2) Physical/chemical check parameters (turbidity, pH, conductivity, colour): same frequency as microbiological; (3) Extended investigation parameters (metals, nitrate, pesticides, THMs, TOC, PAHs): minimum 1 per 2,000 m3/day; for 10,000 m3/day: 5 samples per year from defined sampling points; (4) Cryptosporidium: risk-based monitoring at treatment works serving surface water or vulnerable groundwater; continuous monitoring (10 L/hour flow-through sampler) for highest-risk works with daily or rolling analysis; (5) Lead at consumer tap: UK DWI requires random daytime sampling programme with minimum sample numbers per supply zone, proportional to population. DWI enforces compliance via annual returns and site inspections; compliance failure triggers investigation and remediation Undertaking.

    What tests are included in a standard water quality analysis?

    Standard UK drinking water quality analysis covers parameters in the Water Supply (Water Quality) Regulations 2016 across three groups: (1) Microbiological: E. coli (absent in 100 mL, indicator of faecal contamination); total coliforms (absent in 100 mL); Enterococci (absent in 100 mL); Clostridium perfringens (absent in 100 mL, indicator of protozoan risk); colony counts at 22 degrees C and 37 degrees C (less than 100/mL and less than 20/mL respectively at supply point); (2) Physical/chemical: pH (6.5 to 9.5), turbidity (less than 4 NTU at consumer tap), conductivity (less than 2,500 uS/cm at 20 degrees C), colour (less than 20 mg/L Hazen), taste, odour, temperature; (3) Chemical: lead (less than 10 ug/L), arsenic (less than 10 ug/L), nitrate (less than 50 mg/L), nitrite (less than 0.5 mg/L at treatment; 0.1 mg/L at distribution), fluoride (less than 1.5 mg/L), manganese (less than 50 ug/L), iron (less than 200 ug/L), copper (less than 2.0 mg/L), aluminium (less than 200 ug/L), nickel (less than 20 ug/L), THMs total (less than 100 ug/L), bromate (less than 10 ug/L), TOC (no abnormal change), pesticides individual (less than 0.1 ug/L), total pesticides (less than 0.5 ug/L), PAHs (less than 0.1 ug/L). PFAS added to UK monitoring from 2026 under new DWD transposition.

    What is a UKAS-accredited water testing laboratory?

    UKAS (United Kingdom Accreditation Service) is the national accreditation body for the UK, operating under ISO/IEC 17011 and government oversight under the Accreditation Regulations 2009. ISO/IEC 17025:2017 accreditation for water testing laboratories means: the laboratory has demonstrated technical competence for specific defined test methods; equipment is calibrated to traceable national standards (NPL, NIST); staff are trained and assessed; internal quality controls (blanks, spikes, duplicates) meet defined limits; proficiency testing participation confirms inter-laboratory comparability. DWI Requirement: the Water Supply (Water Quality) Regulations 2016 (Schedule 2) require that water quality analysis for regulatory compliance is carried out by a UKAS-accredited laboratory using methods approved by DWI (listed in the Approved Methods for the Examination of Water and Associated Materials, AMEWAM). Each accredited laboratory has a UKAS schedule listing specific tests and methods approved - not all tests at one lab are necessarily accredited. How to verify: search the UKAS online laboratory schedule database at ukas.com/find-an-accreditation-body/laboratory-accreditation/. Major UK accredited water testing labs: Eurofins Water UK, Socotec UK Water, Bureau Veritas Environment, ALS Life Sciences, Qlab (Scottish Water), WML (Welsh Water's in-house lab), Anglian Water in-house labs, Thames Water Caversham laboratory.

    Can homeowners test their own tap water?

    Yes, homeowners can test their tap water, though results must be interpreted carefully. Options: (1) DIY test kits: consumer test kits (Palintest, Hach, Amazon-sold kits) for pH, hardness, chlorine, nitrates, lead, bacteria (simplified immunoassay or reagent tablet methods); typically semi-quantitative and less accurate than laboratory analysis; suitable for screening but not regulatory compliance; typical cost GBP 10 to 50; (2) Independent laboratory analysis: send water sample to a UKAS-accredited laboratory for full or partial parameter analysis; cost varies: basic microbiological (E. coli, coliforms) GBP 20 to 40; full regulatory panel GBP 150 to 400; lead and metals panel GBP 50 to 100; contact labs: Eurofins, Socotec, SGS, ALS - all offer homeowner services; sampling instructions critical (flush cold tap for 2 minutes before sampling for distribution system quality; run for only 30 seconds if testing internal plumbing/lead service line quality); (3) Water company data: UK water companies must publish annual quality reports (Drinking Water Quality Reports) and make supply zone data available publicly via DWI website (dwi.gov.uk); homeowners can check their supply zone's annual results and any compliance failures; (4) If concerned about lead: test with 30-second standstill sample (don't run tap before sampling) to assess lead from service line or internal plumbing; DWI lead at tap standard is 10 ug/L.

    Case Study·Drinking water quality audit, North East England
    Challenge

    A manufacturing company operating a cooling system at a site with its own borehole supply began receiving complaints of discoloured water from site welfare facilities. Internal lead pipework from a 1960s build was suspected, and a historical DWI notice for the site's private supply had flagged elevated manganese (82 ug/L against a standard of 50 ug/L). No UKAS-accredited sampling had been conducted in six years.

    Approach

    A UKAS-accredited laboratory (ISO/IEC 17025:2017) conducted a full Private Water Supply Regulations 2016 check investigation: 14 sample points including three standstill samples for lead; microbiological analysis using EN ISO 9308-1 membrane filtration; metals panel (ICP-MS, ISO 17294-2) covering lead, manganese, iron, copper, arsenic, and nickel; nitrate by ion chromatography (ISO 10304-1); THMs by GC-MS. Chain of custody procedures maintained throughout.

    Outcome

    Lead at tap was confirmed at 38 ug/L at one welfare point (pre-1970 lead solder in a cistern-fed unit), and manganese at 64 ug/L at the borehole outlet. The company replaced the lead solder fittings (GBP 2,400), fitted a greensand pressure filter for manganese removal, and implemented a quarterly sampling schedule under the Private Water Supply Regulations 2016, satisfying the local authority responsible authority requirement.

    Questions to Ask Shortlisted Providers

    1. 1

      Is your laboratory UKAS-accredited to ISO/IEC 17025:2017 for the specific test methods relevant to our sample type?

      UKAS accreditation must cover the specific methods being used (e.g. EN ISO 9308-1 for E. coli, ISO 17294-2 for metals by ICP-MS); blanket lab accreditation does not guarantee every test is covered under scope.

    2. 2

      What are your sample transport and holding time requirements for each parameter group?

      Microbiological samples must reach the lab within 24 hours at 4 degrees C; chlorinated samples need sodium thiosulphate preservation; incorrect transport invalidates results and wastes sample costs.

    3. 3

      Do you participate in inter-laboratory proficiency testing schemes (EA CONTEST, RQAP) and can you share recent performance data?

      Proficiency testing results prove the lab's analytical accuracy against reference standards; labs with outlier results in CONTEST rounds should be avoided for regulatory compliance samples.

    4. 4

      Can your laboratory provide a legal chain-of-custody document for samples used in regulatory submissions or litigation?

      For samples supporting a DWI investigation, EA enforcement, or legal proceedings, chain of custody documentation is mandatory; not all commercial labs maintain this standard.

    5. 5

      What is your turnaround time for microbiological results, and do you offer emergency 24-hour analysis for supply-critical events?

      Water supply failures require rapid microbiological results; some labs offer same-day or next-day turnaround at a premium, which can be critical for maintaining supply to vulnerable populations.

    What Drives Cost in This Category

    Parameter scope and analysis method

    Basic microbiological panel (E. coli, coliforms) costs GBP 20 to 50 per sample; full DWI-standard regulatory check including metals, organics, and microbiological: GBP 200 to 500 per sample; PFAS analysis by LC-MS/MS adds GBP 150 to 400 per sample.

    Sample volume and number of points

    Monitoring programmes with 20+ samples per quarter attract framework pricing (20 to 35 percent discount vs per-sample rates); multiple-point programmes are routinely tendered as annual supply contracts.

    Turnaround time

    Standard 5-day turnaround for routine analysis; 24-hour emergency turnaround carries a 50 to 150 percent premium; same-day emergency microbiological results can cost GBP 150 to 300 per sample versus GBP 25 to 40 standard.

    Sample collection and logistics

    Laboratory sampling visit costs GBP 150 to 500 per visit plus mileage; remote sites with long travel times may require a regional lab partner or client-collected samples with courier collection.

    Key Regulations & Standards

    Water Supply (Water Quality) Regulations 2016

    England and Wales: sets Prescribed Concentrations and Values (PCVs) for 60+ parameters; requires UKAS-accredited laboratory analysis for all compliance sampling; DWI approves sampling methods (listed in AMEWAM, Approved Methods for the Examination of Water and Associated Materials).

    ISO/IEC 17025:2017

    International standard for laboratory competence; UKAS accreditation against ISO/IEC 17025 is mandatory for all labs analysing drinking water samples for DWI compliance; each approved test method must be individually listed in the laboratory's UKAS schedule.

    Private Water Supply Regulations 2016

    SI 2016/1197: local authorities are responsible for regulating private water supplies in England; risk assessment and check/audit investigation required; UKAS-accredited analysis mandatory; property owner bears cost of remediation if standards not met.

    PFAS Monitoring Transition

    UK transposition of the revised Drinking Water Directive will add PFAS (per- and polyfluoroalkyl substances) to the mandatory monitoring parameter list from approximately 2026; DWI consultation in 2024 proposed individual PFAS less than 0.1 ug/L and total PFAS sum less than 0.5 ug/L; labs must be UKAS-accredited for EPA Method 533 or 537.1 analysis by LC-MS/MS.