PlainWater
Contaminants →
EPA SDWIS ~155K water systems EPA + UCMR5

Radium-226

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

PlainWater home → About this data

EPA contaminant code: 4020

Total Violations
108,989
Systems Affected
3,237
Health-Based %
0%
Most Affected State
-

What this means

Radium-226 appears in EPA SDWIS with 108,989 recorded violations across 3,237 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

Radium-226 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
West Jackson Co Utility Dist MS 678 28,544
Town of Aberdeen MS 574 7,783
Keesler Air Force Base MS 533 8,006
City of Pontotoc MS 352 9,398
City of New Albany MS 340 8,900
Buckatunna Water Association MS 340 4,686
Sebastopol Water Association MS 336 6,207
City of Ripley MS 336 11,351
North Lee W/a #1-Barnes Crosng MS 320 2,672
Harrisville W/A MS 312 1,967
Circle H MHP NC 311 68
Tallahala W/A-Antioch MS 300 3,427
Wren W/A MS 300 3,068
City of Ocean Springs MS 292 26,168
Barrontown W/A MS 288 7,999
Gulf Park MS 284 4,813
Smiths Crossing Water Assn MS 280 4,480
Mooreville-Richmond W/a #1 MS 277 3,807
Copiah-New Zion Water Assn,inc MS 260 3,791
Shady Grove Utility District MS 256 2,390
J P Utility District MS 244 3,839
City of Forest MS 244 5,430
Town of Sallis MS 240 2,785
Rawls Springs Utility District MS 240 3,168
G T & Y Water District Inc MS 240 3,965
Poor House W/a #1 MS 240 2,806
City of Waveland MS 240 6,400
Lorman Water Association MS 240 2,162
City of Ellisville MS 240 4,600
Sharon Water Works MS 240 2,769

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 Radium-226 in drinking water? ▼
Radium-226 is a contaminant tracked by the EPA under the Safe Drinking Water Act. It has caused 108,989 violations across 3,237 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 Radium-226 violations? ▼
3,237 public water systems across the United States have at least one Radium-226 violation recorded in the EPA SDWIS database.
Are Radium-226 violations dangerous? ▼
0% of Radium-226 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 Radium-226 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

Browse all → | Rankings →
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.