Dalapon in Drinking Water: Health Risks, Sources, and How to Remove It
Dalapon is an organic chemical contaminant that can potentially be found in drinking water supplies. Classified as an organic compound, its presence is regulated by the Environmental Protection Agency (EPA) to ensure water safety. The EPA has established a Maximum Contaminant Level (MCL) of 200 μg/L for Dalapon in public water systems.
Health Effects
Drinking water containing Dalapon at levels above the regulatory limit can lead to health concerns. The primary health effect associated with exposure to this contaminant is minor kidney changes. Consuming water contaminated with Dalapon over a long period may result in these minor physiological alterations.
How Dalapon Gets Into Tap Water
Dalapon enters the water supply primarily through agricultural practices. It is used as an agricultural herbicide, and runoff from treated farm fields can carry the chemical into surface or groundwater sources. Consequently, drinking water systems in or near agricultural regions are the most likely to be affected.
How to Remove Dalapon From Your Water
If Dalapon is present in drinking water, effective filtration methods are available to reduce its levels. Granular activated carbon is a common and proven treatment method used to filter this organic chemical out of water. Treatment systems using granular activated carbon are typically certified for this contaminant to ensure safety.
Should You Test Your Water?
You can check for Dalapon in your drinking water by reviewing your local water utility's consumer confidence report or searching on WaterQ. If you use a private well located near agricultural areas, periodic testing for organic contaminants is recommended. You can also look up your local water system on WaterQ or check the Dalapon data page for reported levels in your area.
Frequently Asked Questions
Is Dalapon dangerous in drinking water?
Dalapon is regulated because long-term exposure to levels above the safety threshold can lead to health effects. Specifically, consuming water with elevated levels of Dalapon is associated with minor kidney changes. However, it is not considered an acute or highly urgent risk compared to microbial or radionuclide contaminants.
How does Dalapon get into tap water?
Dalapon gets into tap water primarily through agricultural herbicide runoff. Rain or irrigation can wash the herbicide from treated crop fields into the local groundwater or surface water supplies that feed public water systems.
How can I remove Dalapon from my water?
Dalapon can be removed from your drinking water using granular activated carbon treatment methods. Standard home filtration systems that utilize activated carbon are commonly certified to effectively reduce organic chemicals like Dalapon.
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.