By Challenge / Contaminant
Start from the contaminant: PFAS, heavy metals, COD/BOD, pathogens, scaling, and more.
Challenge pages group providers by the specific contaminant or problem they solve. Start here when the brief is 'remove X' rather than 'build Y'.
27 specialist pages · 96 specialist providers · 8 Insider guides
Specialist pages
Pick the page that matches your project
Metals and inorganic contaminants
Heavy Metals Removal Companies
Heavy metals treatment, precipitation, IX, sorbents, and membranes for lead, mercury, cadmium, chromium, arsenic.
12 specialists
Chromium Removal Water Treatment Companies
Total and hexavalent chromium removal: reduction to Cr(III) and hydroxide precipitation, strong base anion exchange, and membranes for plating and tannery effluent.
10 specialists
Arsenic Removal Water Treatment Companies
Arsenic treatment, adsorption media, oxidation/coprecipitation, and membrane-based removal for drinking water.
9 specialists
Phosphate Removal Companies
Phosphorus removal, chemical precipitation, EBPR, sorbents, and recovery technologies for compliance and reuse.
9 specialists
Ammonia Removal Companies
Ammonia removal providers, nitrification/denitrification, stripping, breakpoint chlorination, and IX.
8 specialists
Silica Removal Water Treatment Companies
Silica removal, lime softening, IX, RO, and specialty resins for boiler feed, power, and semiconductor water.
7 specialists
Iron Removal Water Treatment Companies
Iron and manganese removal, oxidation, greensand, biological filters, and sequestration for well and surface water.
6 specialists
Nitrate Removal Water Treatment Companies
Nitrate removal, ion exchange, RO, biological denitrification, and electrochemical processes.
6 specialists
TDS Reduction Companies
TDS reduction via RO, NF, ED/EDR, capacitive deionization, and thermal processes for brackish and process water.
5 specialists
Manganese Removal Water Treatment Companies
Manganese removal from groundwater and distribution: catalytic and biological filtration, permanganate and chlorine oxidation, and deposit control in the network.
1 specialist
Fluoride Removal Water Treatment Companies
Defluoridation specialists: activated alumina, bone char and ion exchange contactors, Nalgonda coagulation, and reverse osmosis for high-fluoride groundwater.
1 specialist
Boron Removal Water Treatment Companies
Boron removal for desalinated and industrial water: second-pass reverse osmosis at elevated pH, boron-selective ion exchange resins, and blending strategies.
1 specialist
Organics and emerging contaminants
Oil & Grease Removal Companies
Oil/water separation experts, API separators, DAF, coalescers, and membranes for free, emulsified, and dissolved oil.
16 specialists
COD/BOD Reduction Companies
COD and BOD reduction solution providers, biological, AOP, and hybrid processes for high-strength industrial effluents.
10 specialists
Color Removal Wastewater Companies
Color removal solution providers, ozone, coag/floc, adsorption, and membrane processes for textile and dye effluents.
9 specialists
Pharmaceutical Contaminant Removal Companies
Micropollutant removal, ozone, AOP, GAC, and NF for pharmaceuticals, hormones, and personal care products.
8 specialists
Odor Control Water Treatment Companies
Odor control providers, biofilters, scrubbers, activated carbon, and chemical dosing for H₂S and VOCs.
7 specialists
PFAS Removal Water Treatment Companies
PFAS treatment providers, GAC, IX resins, RO, foam fractionation, and destruction technologies for forever chemicals.
6 specialists
Microplastics Removal Companies
Microplastic removal via high-efficiency filtration, membranes, coag/floc, and advanced oxidation.
6 specialists
Plant health and water quality
Zero Liquid Discharge Use Case Companies
ZLD use-case providers showcasing delivered projects, concentration, crystallization, and salt recovery at scale.
23 specialists
Scale & Corrosion Control Companies
Scale and corrosion control programs, inhibitors, monitoring, and side-stream treatment for cooling and boilers.
16 specialists
Biofouling Control Companies
Biofouling monitoring and control, biocides, chlorine dioxide, UV, and membrane cleaning programs.
7 specialists
Turbidity Removal Companies
Clarification and filtration providers for turbidity, coag/floc, DAF, sand, multimedia, and membrane processes.
6 specialists
Pathogen Removal & Disinfection Companies
Multi-barrier pathogen removal, filtration, UV, chlorine, ozone, and membranes for bacteria, viruses, and cysts.
5 specialists
Urban Runoff Pollution Control Companies
Stormwater quality providers tackling urban runoff: hydrodynamic separators, oil-water separation, SuDS, and source control.
2 specialists
Non-Revenue Water (NRW) Reduction Companies
End-to-end NRW reduction: leak detection, pressure management, smart metering, and analytics that recover lost water.
1 specialist
Also in this group, with no specialist listed yet
These pages list providers with related capabilities. Post your project and we route it to qualified suppliers directly.
What you will find here
Sometimes the problem comes first. Start from the contaminant, not the plant.
You don't always need 'a membrane plant'. You need arsenic below the limit, PFAS destroyed, or a cooling tower that stops scaling. These pages connect you with providers whose core expertise is a specific contaminant or failure mode: PFAS, heavy metals, COD/BOD, oil & grease, arsenic, trace pharmaceuticals, scale, corrosion, nitrate, ammonia, color, microplastics, silica, phosphate, biofouling, odor, and more.
From the Insider
- Mining Wastewater Treatment: Technologies, Compliance, and the Closure Liability Few Operators Cost ProperlyIndustry Deep Dives
- Textile Wastewater Colour Removal: Costs, Technologies, and the Reuse DecisionIndustry Deep Dives
- Chemical and Petrochemical Wastewater Treatment: Toxicity, Recalcitrance, and Real BenchmarksIndustry Deep Dives
- Pharmaceutical Wastewater Treatment: High-Strength Effluent, Nitrogen, and the API QuestionIndustry Deep Dives
- Landfill Leachate Treatment: Ammonia, the COD Floor, and the Age ProblemIndustry Deep Dives
- Oil & Gas Produced Water Treatment: Options and RegulationsIndustry Deep Dives
- Dissolved Air Flotation (DAF): How It Works and CostsTechnology Guides
- Offshore Produced Water Treatment: The 30 mg/L Compliance TrainIndustry Deep Dives
The chemistry behind it
Open The Element BookOther groups
Core processes
Treatment Technologies
Filtration, membranes, disinfection, and desalination: the building blocks of any water plant.
Circular & urban water
Reuse, Recovery & Stormwater
ZLD, industrial reuse, brine management, resource recovery, SuDS, and stormwater at city scale.
Plants, pipes & hardware
Infrastructure, Networks & Equipment
WWTPs, EPC, pipe networks, smart metering, tanks, valves, and pumps: the physical backbone of water.
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