Contaminant 1009 in U.S. Drinking Water
Health-based violation data for Contaminant 1009 from EPA Safe Drinking Water Information System (SDWIS). Covers all community water systems with violations on record.
Contaminant 1009 has been found in violation of EPA standards in 45 water systems across 13 states, with 151 total health-based violations recorded. The most affected states are Texas, Missouri, Kansas.
Contaminant 1009 is regulated under the EPA Safe Drinking Water Act, which sets enforceable Maximum Contaminant Levels (MCLs) and associated treatment technique requirements for public water systems. The EPA Safe Drinking Water Information System (SDWIS) tracks every recorded violation nationwide and links it back to the specific public water system (PWSID), violation type, and begin date.
Across the United States, SDWIS records show 151 health-based violations for Contaminant 1009 affecting 45 community water systems in 13 states. Violation counts cluster heaviest in Texas, Missouri, Kansas, with Texas alone accounting for 57 violations across 13 systems. The contaminant is listed on the federal primary drinking water regulations.
A health-based violation does not mean residents were necessarily harmed, it means the contaminant exceeded the federal MCL in a compliance sample, triggering notification and remediation requirements. States and utilities maintain primary enforcement responsibility. To check the status of a specific water system, request its most recent Consumer Confidence Report or consult the EPA's Drinking Water Watch portal for the corresponding state.
Violations by State
States ranked by number of health-based violations for Contaminant 1009.
Most Affected Water Systems
Top 50 water systems by number of Contaminant 1009 health-based violations.
Frequently Asked Questions
Is Contaminant 1009 in my water?
Contaminant 1009 has been detected in violation of EPA health standards in 45 water systems across 13 states. To check your specific utility, look up your annual Consumer Confidence Report (CCR) - water systems are required to disclose all violations.
How many water systems have Contaminant 1009 violations?
EPA SDWIS records show 45 community water systems with health-based Contaminant 1009 violations, totaling 151 violations. These represent cases where the contaminant exceeded the EPA Maximum Contaminant Level (MCL).
Which states have the most Contaminant 1009 violations?
The states with the most Contaminant 1009 violations are: Texas (57 violations), Missouri (16 violations), Kansas (13 violations), Louisiana (10 violations), Nevada (7 violations).
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About This Data
Violation data is from the EPA Safe Drinking Water Information System (SDWIS). Only health-based violations are shown, these include Maximum Contaminant Level (MCL) and Treatment Technique (TT) violations. Monitoring and reporting violations are excluded. Data may not reflect the most current enforcement actions.
Source: U.S. Environmental Protection Agency, SDWIS Federal Reporting Services U.S. Environmental Protection Agency, SDWIS Federal Reporting Services
Read our methodology - how this data is sourced, computed, and verified.