Picloram in Drinking Water: Health Risks, Sources, and How to Remove It
Picloram is an organic chemical contaminant that can sometimes be found in drinking water systems. The Environmental Protection Agency (EPA) has set a Maximum Contaminant Level (MCL) of 500 μg/L for this substance. Monitoring for this compound helps ensure that public water supplies remain safe and within federal regulatory limits.
Health Effects
Ingesting water containing levels of Picloram above the regulatory limit over a long period can lead to health issues. Specifically, exposure to this organic compound is associated with liver problems. Ensuring levels remain below the standard is important for protecting long-term health.
How Picloram Gets Into Tap Water
Picloram primarily enters drinking water supplies through agricultural or land management activities. Its presence in water sources is typically linked to herbicide use. Runoff or leaching from treated areas can transport the chemical into water resources.
How to Remove Picloram From Your Water
If Picloram is detected in water, specific filtration technologies can be used to remove it. Granular activated carbon is a recognized treatment method that is effective for reducing levels of this contaminant. Treatment systems utilizing this technology are commonly employed to clean affected water.
Should You Test Your Water?
You can check for Picloram by reviewing your local water utility's annual consumer confidence report or searching on WaterQ. If you rely on a private well near areas where herbicides are used, you may want to have your water tested by a certified laboratory. You can also look up your local water system on WaterQ or check the Picloram data page for reported levels in your area.
Frequently Asked Questions
Is Picloram dangerous in drinking water?
Yes, if consumed at high levels over long periods, Picloram can be harmful to health. The primary health concern associated with this organic chemical is liver problems. Keeping levels below the EPA limit of 500 μg/L helps prevent these issues.
How does Picloram get into tap water?
Picloram enters water supplies primarily through herbicide use. Runoff from fields or rights-of-way can carry the chemical into surface water or leach it into groundwater.
How can I remove Picloram from my water?
Picloram can be removed from drinking water using treatment systems equipped with granular activated carbon. This filtration method is effective at reducing the concentration of the contaminant.
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.