Simazine in Drinking Water
EPA limits, health effects, and what to do if your water is affected.
🩨 Health Effects
Simazine is a triazine herbicide similar to atrazine. Long-term exposure above the MCL may cause problems with blood, liver, kidney, and adrenal glands.
📍 Sources in Water
Used to control broadleaf weeds in corn crops, orchards, and on residential lawns. Enters water through agricultural and residential runoff. Detected in surface and groundwater in agricultural areas.
✅ What To Do
Activated carbon and reverse osmosis can reduce simazine. Violations are most common in agricultural surface water systems in the spring.
Check your tap water for Simazine
Search your ZIP code to see if your water system has had Simazine violations, plus lead testing results and an overall safety grade.
Search your ZIP code →Data from the EPA's Safe Drinking Water Information System (SDWIS). MCLs reflect minimum federal standards; some contaminants may pose health risks below these thresholds.