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EPA SDWIS ~155K water systems EPA + UCMR5

OXAMYL

EPA SDWIS quarterly extract data for this analyte. Detection counts and health-based violation counts reflect the most recent federal release.

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EPA contaminant code: 2036

Total Violations
43,557
Systems Affected
8,002
Health-Based %
0%
Most Affected State
-

What this means

OXAMYL appears in EPA SDWIS with 43,557 recorded violations across 8,002 public water systems. Of those, 0% are classified as health-based, meaning the reading exceeded a federally enforceable Maximum Contaminant Level or a treatment-technique requirement rather than a monitoring or reporting lapse. Health-based violations are the subset that trigger formal corrective action and public notification, so the share is a useful signal of real-world exposure risk rather than paperwork drift. State-level concentration data is not consistently reported for this contaminant, so regional interpretation should lean on the system table below rather than state aggregates. Utilities listed below are ranked by cumulative violation count, so a higher rank reflects persistence in the record rather than a single spike; readers comparing systems should consider population served alongside violation count to gauge how many households were actually exposed.

Violation Type Split

OXAMYL violations broken down by EPA classification.

Health-based (0%) Monitoring/Reporting (100%)

Health-based violations indicate the contaminant exceeded an EPA Maximum Contaminant Level (MCL) or treatment-technique requirement; monitoring/reporting violations are procedural.

Most Affected Water Systems

System State Violations Population
Pinnacle Water Association WV 184 85
Salem Heights Estate PA 157 62
Congregation Ohr Menachem PA 149 30
Coal Mountain Water WV 149 80
Skyview Estates IL 124 56
Prague OK 99 2,395
Frankfort Psd WV 99 6,747
27 Maple Drive CT 88 38
Coxville Water Assn #1 WA 86 26
Aqua PA Sun Valley PA 79 120
Neshaminy Manor Center PA 74 2,100
Springhill Park Subdivision MT 72 90
Willow Springs MHP IN 66 25
Helena RV and Mobile Home Park MT 66 250
PA American Audubon PA 65 8,200
Oilton OK 64 1,435
Lewis River Golf Course WA 64 300
Seneca Trail Christian Academy WV 64 100
Malta City Of MT 63 1,800
Paradise Stream Resor PA 63 774
Indian Creek Valley Water Auth PA 63 7,000
Ambler Boro Water Dept PA 60 20,000
Criswell Court MHP IL 56 94
Tooele City Water System UT 56 37,100
Plymouth Community Church IN 53 90
Taggares Fruit Co WA 53 152
Payson Town Of AZ 52 17,682
Pbc Linear IL 52 140
Manhasset Lakeville WD NY 52 43,000
Tower Springs LLC PA 51 25

Drinking Water Guides

Understanding Water Quality Data

What EPA SDWIS tracks, how violations are classified, and what MCLs mean.
PFAS in Drinking Water

What forever chemicals are, EPA testing results, and 2024 standards.
Is My Water Safe?

How to assess your local water quality and when to take precautions.

Frequently Asked Questions

What is OXAMYL in drinking water? ▼
OXAMYL is a contaminant tracked by the EPA under the Safe Drinking Water Act. It has caused 43,557 violations across 8,002 public water systems nationwide. 0% of these violations are health-based, meaning the contaminant exceeded Maximum Contaminant Levels (MCLs) or treatment technique requirements.
How many water systems have OXAMYL violations? ▼
8,002 public water systems across the United States have at least one OXAMYL violation recorded in the EPA SDWIS database.
Are OXAMYL violations dangerous? ▼
0% of OXAMYL violations are health-based, meaning the contaminant level exceeded safe limits set by the EPA. Health-based violations require corrective action by the water system. Not all violations indicate immediate health risk, but they signal that water quality standards were not met.
Which state has the most OXAMYL violations? ▼
State-level breakdown data is not available for this contaminant.
Where does this contaminant data come from? ▼
All violation data comes from the EPA Safe Drinking Water Information System (SDWIS), which tracks compliance for all public water systems regulated under the Safe Drinking Water Act. SDWIS records violations including Maximum Contaminant Level (MCL) exceedances, treatment technique failures, and monitoring/reporting issues.

Data Sources

Contaminant violation data from the EPA Safe Drinking Water Information System (SDWIS). Violations are categorized as health-based (Maximum Contaminant Level exceedances, treatment technique failures) or monitoring/reporting violations.

Related

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Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Disclaimer: This information is provided for informational purposes only and does not constitute professional advice. Data is sourced from the EPA Safe Drinking Water Information System (SDWIS). Consult a qualified professional before making decisions based on this data.

Read our methodology - how this data is sourced, computed, and verified.

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This page draws directly on EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.