Hexachlorocyclopentadiene in Drinking Water: Health Risks, Sources, and How to Remove It
Hexachlorocyclopentadiene is an organic chemical compound that can sometimes be found in drinking water. It is categorized as an organic contaminant. The EPA has established a Maximum Contaminant Level (MCL) of 50 μg/L for this substance in public water systems.
Health Effects
Exposure to Hexachlorocyclopentadiene in drinking water above the regulatory limit can lead to adverse health effects. Specifically, ingestion of this contaminant has been associated with kidney and stomach problems. It is important to monitor water quality to avoid these potential health issues.
How Hexachlorocyclopentadiene Gets Into Tap Water
Hexachlorocyclopentadiene enters the environment primarily through industrial activities. The main source of this contaminant in water resources is wastewater discharges from chemical manufacturing facilities. Runoff or improper disposal from these industrial operations can lead to contamination of drinking water sources.
How to Remove Hexachlorocyclopentadiene From Your Water
If this organic compound is detected in water supplies, effective filtration methods are available for its removal. Water systems commonly utilize treatment methods such as granular activated carbon or packed tower aeration to reduce its concentration. These standard filtration techniques are effective at bringing the levels below the EPA limit.
Should You Test Your Water?
Consumers can check for this contaminant by reviewing their annual consumer confidence report or by searching the local utility data on the WaterQ website. If you rely on a private well located near chemical manufacturing activities, periodic testing for organic chemicals is recommended. You can also look up your local water system on WaterQ or check the Hexachlorocyclopentadiene data page for reported levels in your area.
Frequently Asked Questions
Is Hexachlorocyclopentadiene dangerous in drinking water?
Yes, Hexachlorocyclopentadiene can be harmful if it is present in drinking water at levels exceeding the EPA limit. Ingestion of this organic contaminant has been linked to kidney and stomach problems. It is important to treat water if these levels are exceeded to protect health.
How does Hexachlorocyclopentadiene get into tap water?
This contaminant typically enters the water supply through releases from chemical manufacturing facilities.
How can I remove Hexachlorocyclopentadiene from my water?
It can be effectively removed from drinking water using treatment methods like granular activated carbon or packed tower aeration.
Source: EPA National Primary Drinking Water Regulations and WaterQ National Database. For more contaminants, visit our contaminant library.
What actually removes pesticides and herbicides
These are organic molecules, and granular activated carbon adsorbs them well — it is EPA's designated best available technology for nearly the whole class. An NSF/ANSI 53 filter is sufficient; reverse osmosis is not required. Worth knowing about timing: pesticide levels in surface-water systems spike for a few weeks after spring application, and an annual average in your utility report can hide a much higher seasonal peak.
Works
- Carbon certified for lead (NSF 53)The cheapest thing that genuinely removes lead, cysts and many VOCs.
- Reverse osmosis (NSF 58)The broadest removal available at home: arsenic, nitrate, fluoride, PFAS, TDS.
Will not fix this
- Ion-exchange water softener
- UV disinfection (NSF 55)
- Ion-exchange pitcher
Options that carry the right certification
Ordered cheapest-adequate first. Prices are indicative bands and move often.
| Product | Certification | Upfront | Per year | |
|---|---|---|---|---|
| Aquasana AQ-5200 Under-SinkUnder-sink | NSF/ANSI 42, 53, 401 and P473 certified.Catch:Carbon, not RO — no meaningful fluoride, nitrate or arsenic reduction. | $110–160 | $80–120 | Check price |
| Brita Elite Pitcher FilterPitcher | NSF/ANSI 42 and 53 certified, including a lead reduction claim.Catch:No fluoride, nitrate or arsenic reduction. Not PFAS-rated. | $25–40 | $50–70 | Check price |
| APEC ROES-50 EssenceUnder-sink | Built with WQA-certified components to NSF/ANSI 58.Catch:Needs an under-sink drain connection and a spare hole for the dedicated faucet. Strips minerals — some people dislike the flat taste. | $180–240 | $50–80 | Check price |
Certification listings change. Before buying, confirm the current listing for the exact model in the NSF certified products database — a manufacturer's marketing page is not a certification. WaterQ earns a commission on purchases made through these links at no extra cost to you; see our affiliate disclosure. This is general information, not medical or engineering advice.
For a full breakdown of certifications, running costs and the models worth considering, see our buying guide for pesticides and herbicides.