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EPA SDWIS ~155K water systems EPA + UCMR5

Public Notice

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: 7500

Total Violations
326,526
Systems Affected
32,526
Health-Based %
0%
Most Affected State
-

What this means

Public Notice appears in EPA SDWIS with 326,526 recorded violations across 32,526 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

Public Notice 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
Congregation Ohr Menachem PA 2,021 30
Aqua PA Sun Valley PA 1,567 120
Seven Estates TX 1,395 189
Coal Mountain Water WV 1,369 80
Hiawatha Water WV 1,059 63
Pinnacle Water Association WV 909 85
Sunrise Lakes Sec 12 PA 902 125
Rittenhouse Place PA 887 647
Country Glen Townhomes PA 849 50
Oak Hill Acres Mobile Home Subdivision TX 823 81
Key Road Subdivision Water System TX 788 54
Salem Heights Estate PA 657 62
Valley Estates TX 650 68
Stallion Oilfield Services PA 615 25
T L Water Jones Acres TX 586 120
South Midland County Water System TX 572 165
Candelaria WSC TX 548 138
Ridgecrest PA 543 55
Circle H MHP NC 539 68
Newport Boro Water Auth PA 526 3,200
Loma Escondida Water Association NM 501 89
Leroys Mobile Home Park TX 499 60
St Pauls Luth Ch PA 474 100
Franklin Water Systems 3 TX 451 201
Aero Valley Water Service TX 435 68
Stormlight Mobile Home Park TX 413 76
Country View MHP TX 408 54
Centerville Muni Water Auth PA 398 75
Warren Road Subdivision Water Supply TX 395 195
Bullhead City Mohave AZ 375 36,330

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 Public Notice in drinking water? ▼
Public Notice is a contaminant tracked by the EPA under the Safe Drinking Water Act. It has caused 326,526 violations across 32,526 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 Public Notice violations? ▼
32,526 public water systems across the United States have at least one Public Notice violation recorded in the EPA SDWIS database.
Are Public Notice violations dangerous? ▼
0% of Public Notice 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 Public Notice 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.