Drinking Water Treatment Companies
Potable water treatment companies for municipalities and utilities, conventional, membrane, and advanced treatment.
36 specialist providers · 6 related · 9 countries
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Specialists in drinking water treatment
Providers whose services or self-declared specialties match this category.
Guangdong Xinjieyuan Environmental Protection Technology Co., Ltd.
VerifiedChina · 51-200 employees
Guangdong Xinjieyuan Environmental Technology Co., Ltd. is a professional manufacturer specializing in industrial water purification equipment. We focus on RO, ultrafiltration, EDI and desalination systems, holding ISO & CE certifications. With over 10 years of technical experience, we supply customized pure water solutions for food, pharmacy, agriculture and aquaculture, supporting OEM & ODM and exporting to global markets. All units adopt top-grade membrane and pump parts, with strict factory testing and one-year full warranty.
Buyer's guide
The buyer's guide to drinking water treatment
Compliance, Taste, and Pathogen Control in Potable Water Treatment Systems
Drinking water treatment is one of the most regulated sectors in water technology, with treatment requirements flowing from EPA's National Primary Drinking Water Regulations (NPDWR) and corresponding state primacy rules. Surface water systems must achieve at minimum 3-log Giardia and 4-log virus inactivation credit under the Surface Water Treatment Rule (SWTR) and its revisions, and must control for disinfection byproducts under the Stage 2 DBPR. Groundwater systems may be exempt from filtration requirements if they meet specified turbidity and microbiological performance criteria, but groundwater under the direct influence of surface water (GWUDI) triggers full surface water treatment requirements.
Taste and odor (T&O) complaints are among the most common public concerns in drinking water distribution and often originate from geosmin and 2-methylisoborneol (2-MIB) produced by cyanobacteria or actinomycetes in source water. Activated carbon adsorption, either powdered activated carbon (PAC) dosed seasonally or granular activated carbon (GAC) in contactors, is the primary treatment for T&O control. Ozonation oxidizes geosmin and 2-MIB effectively and is increasingly specified in combination with biologically active carbon (BAC) to enhance overall organic removal and extend GAC service life.
Lead service line replacement programs, driven by EPA's Lead and Copper Rule Revisions (LCRR), are creating significant demand for corrosion control optimization and orthophosphate dosing programs. Municipalities replacing lead service lines must also review their corrosion control treatment (CCT) protocol to ensure that partial replacements do not transiently increase lead release. Providers experienced in corrosion control treatment optimization, sampling design, and regulatory reporting will be essential partners for water systems navigating LCRR compliance over the next several years.
Frequently asked questions
What NSF/ANSI standards apply to materials and chemicals in drinking water treatment systems?
NSF/ANSI 61 covers materials that contact drinking water (pipes, fittings, tanks, coatings, and component materials), ensuring they do not leach contaminants above health-based thresholds. NSF/ANSI 60 covers water treatment chemicals added to potable water. NSF/ANSI 58 covers RO systems for point-of-use and point-of-entry applications. For treatment facilities, equipment specifications should reference NSF/ANSI 61 for all wetted components and require written certification documentation for all chemicals proposed under a treatment program.
How do I control disinfection byproduct (DBP) formation while maintaining adequate disinfection?
The primary strategies are source water management (reducing NOM loading through enhanced coagulation or pre-ozonation), formation potential reduction (removing NOM before chlorination), and switching to alternative disinfectants for distribution system residual (chloramine instead of free chlorine). Enhanced coagulation targeting dissolved organic carbon (DOC) removal, adjusting alum or ferric dose to maximize TOC removal rather than just turbidity, is the most cost-effective first step for surface water utilities facing THM or HAA compliance challenges.
What is the lead and copper rule and how does it affect drinking water treatment systems?
The Lead and Copper Rule (LCR) and its 2024 revisions (LCRR) require public water systems to monitor lead and copper at consumer taps (90th percentile sampling), maintain optimal corrosion control treatment (CCT), and replace lead service lines when lead action levels are exceeded. The 2024 rule mandates inventorying all service line materials and sets a 10-year deadline for lead service line replacement. For treatment providers, this creates demand for orthophosphate dosing optimization, pH and alkalinity control, and corrosion inhibitor program design calibrated to the specific distribution system metallurgy.
How do I evaluate a drinking water treatment provider's regulatory track record?
Request a list of their public water system clients and ask the DWI's published reports (available on the DWI website) for any enforcement notices or undertakings associated with those systems over the past five years. Ask the provider directly about any compliance schedules or enforcement actions involving their clients' treatment systems and what role their design or treatment program played. Providers with a strong regulatory track record should be able to provide references from water company asset managers and DWI contacts willing to discuss compliance performance.
Illustrative scenario · Small private water supply serving a rural estate and holiday park, Cumbria, UK
A composite drawn from typical projects in this category, not a single client engagement. Figures are indicative.
- Challenge
- A private water supply serving 200 properties from a surface stream was operating under a DWI risk assessment requiring two barriers for Cryptosporidium but had only a single slow sand filter in place. A turbidity exceedance during a storm event triggered a boil water notice affecting the holiday park during peak season.
- Approach
- A compact packaged treatment unit combining coagulation, flocculation, and ultrafiltration membranes was installed as a second barrier, integrated with the existing slow sand filter. An online turbidity alarm on the filtered water outlet was wired to automatically divert flow to a holding tank if filtered turbidity exceeded 0.5 NTU, preventing non-compliant water reaching supply.
- Outcome
- The two-barrier treatment configuration satisfied the DWI risk assessment requirement, and the boil water notice was lifted. All subsequent quarterly compliance samples for turbidity, E. coli, and coliforms met WS(WQ)R 2016 limits. The holiday park reported zero further customer complaints related to water quality in the two seasons following commissioning.
Questions to ask shortlisted providers
5
- 01
Is your treatment system designed to achieve the specific log reduction targets required by the DWI risk assessment for our source water classification?
DWI requires specific treatment barriers based on source water type; a system designed to general standards rather than the specific risk assessment may not satisfy the Inspectorate.
- 02
What is the validated removal rate for Cryptosporidium through your proposed treatment train, and has it been demonstrated by third-party challenge testing?
Cryptosporidium removal must be demonstrated by validated methods; manufacturer claims without independent validation data cannot be relied upon for regulatory compliance.
- 03
How does the system respond if online turbidity monitoring detects an exceedance at the treated water outlet?
Automatic diversion or shutdown on turbidity exceedance is the critical safeguard preventing non-compliant water reaching supply during process upsets.
- 04
What is your commissioning protocol, and will it include a regulatory inspection by the relevant DWI officer before the system enters service?
New treatment processes serving public water supplies in England and Wales require DWI notification and may require Regulation 31 approval before commissioning.
- 05
What operator training and ongoing technical support do you provide after commissioning, and what is your response time if the system fails outside business hours?
Drinking water treatment plant failures can require immediate corrective action to prevent distribution of inadequately treated water; response time commitment is a critical selection criterion.
What drives cost in this category
4
- Source water classification and barrier requirements
- Surface water sources requiring two independent treatment barriers for Cryptosporidium demand more complex and costly process trains than groundwater sources with a single barrier requirement.
- Flow rate and peak demand
- Packaged drinking water treatment systems are costed primarily by design flow rate; peak demand driven by seasonal visitors or fire flow requirements can require significantly larger systems than average daily demand alone suggests.
- Disinfection technology and DBP formation risk
- Systems where organic precursors in the source water create THM formation risk may require ozonation or enhanced coagulation upstream of chlorination, adding significant capital cost.
- Monitoring, telemetry, and DWI reporting requirements
- Private water supplies serving 50 or more people must meet enhanced monitoring requirements; online instrumentation for turbidity, pH, and disinfectant residual with automated data logging adds capital and maintenance cost.
Key regulations and standards
4
- Water Supply (Water Quality) Regulations 2016
- Sets the legal quality standards for all drinking water supplies in England, including the framework for DWI risk assessments and required treatment barriers for different source water types.
- Private Water Supplies (England) Regulations 2016
- Governs quality and monitoring requirements for private water supplies serving 50 or more people or used in commercial food production, with risk assessment and remedial action obligations.
- DWI Regulation 31
- Requires advance approval from the Drinking Water Inspectorate before any new treatment process or chemical is introduced into a public water supply.
- BS EN 15975-2
- Security of drinking water supply standard covering risk and crisis management, providing the framework within which treatment resilience and redundancy must be designed.