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EPA SDWIS ~155K water systems EPA + UCMR5

Gross Beta Particle Activity

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: 4100

Total Violations
3,274
Systems Affected
792
Health-Based %
0.1%
Most Affected State
-

What this means

Gross Beta Particle Activity appears in EPA SDWIS with 3,274 recorded violations across 792 public water systems. Of those, 0.1% 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

Gross Beta Particle Activity violations broken down by EPA classification.

Health-based (0.1%) Monitoring/Reporting (99.9%)

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
Eastside MHP OK 268 32
Brooksville OK 164 90
Pecan Tree Water Assn OK 106 22
Rock Creek OK 54 33
Southern Hills Estates OK 51 200
Konawa PWA OK 42 1,479
Grady Co RWD #2 OK 39 455
Abes RV Park OK 39 175
Jefferson Co Cons RWD #1 OK 37 8,398
Gracemont PWA OK 34 336
Bristow Municipal Authority OK 32 3,700
Canoe Mountain Water System OK 31 26
England Shores MHP OK 31 55
Bridgeport OK 30 109
Stonetown Clearview Mhc OK 30 170
Walnut Park Estates OK 28 42
4T Investors LLC OK 25 98
Sasakwa PWA OK 25 150
Penn State Univ PA 25 37,000
Wayne Water Districts NC 24 39,403
Apache OK 22 1,521
Chattanooga PWS OK 21 627
Deer Creek Rural Water Corp OK 21 5,500
Welch PWA OK 20 800
Craig Co RWS & Swmd #3 OK 20 1,100
Canute OK 20 524
Oak Ridge Estates I & II Water Assoc. OK 20 62
Southern Okla Water Corp OK 18 11,250
Blue Jacket PWA OK 16 274
Harper Co RWD #1 OK 16 198

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 Gross Beta Particle Activity in drinking water? ▼
Gross Beta Particle Activity is a contaminant tracked by the EPA under the Safe Drinking Water Act. It has caused 3,274 violations across 792 public water systems nationwide. 0.1% of these violations are health-based, meaning the contaminant exceeded Maximum Contaminant Levels (MCLs) or treatment technique requirements.
How many water systems have Gross Beta Particle Activity violations? ▼
792 public water systems across the United States have at least one Gross Beta Particle Activity violation recorded in the EPA SDWIS database.
Are Gross Beta Particle Activity violations dangerous? ▼
0.1% of Gross Beta Particle Activity 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 Gross Beta Particle Activity 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.