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EPA SDWIS High-volume analyte Dense per-system load

Revised Total Coliform Rule in Drinking Water

11.7 violations per affected system (710,085 across 60,574) - dense load (> 5.8 violations per affected system).

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EPA contaminant code: 8000

Total Violations
710,085
Systems Affected
60,574
Health-Based %
9.2%
Violations / System
11.7

Revised Total Coliform Rule standing, high-volume SDWIS third

Revised Total Coliform Rule sits in the upper third of this extract by raw violation count (710,085), so the national record is thick enough that system-level lists below are a sample of a much larger compliance trail rather than a near-complete inventory. Load is concentrated: 11.7 violations per affected system (dense load (> 5.8 violations per affected system)), which usually means repeat findings on the same PWSIDs rather than one-off detections spread thin. Health-based share is only 9.2% - almost all of this analyte's trail is monitoring/reporting rather than MCL exceedance. Among 157 indexable contaminants, this page is #2 by violation volume. Utilities listed below are ranked by cumulative violation count for this analyte; pair that with population served to gauge household exposure scale.

Nationwide similar contaminants

Nearest by violation volume

Nitrate (490,545) TTHM (327,560) Public Notice (326,526) Lead and Copper Rule (316,481)

Nearest by systems affected

Consumer Confidence Rule (29,061 systems) Coliform (TCR) (98,293 systems) Total Haloacetic Acids (HAA5) (18,140 systems) E. COLI (17,344 systems)

Revised Total Coliform Rule: mixed health vs monitoring split

9.2% health-based · 90.8% monitoring/reporting across 710,085 records.

Health-based (9.2%) Monitoring/Reporting (90.8%)

Most Affected Water Systems

System State Violations Population
Stallion Oilfield Services PA 885 25
Meyers Castle IN 723 25
Orchard View Park NC 517 109
T L Water Jones Acres TX 512 120
Pinon Hills RV Park NM 448 25
Tuck Em Inn PA 442 50
Loma Escondida Water Association NM 429 89
Los Cabritos IN 428 33
Oak Hill Acres Mobile Home Subdivision TX 411 81
Key Road Subdivision Water System TX 390 54
Raccoon Lakeside Lodge IN 389 61
Timber Creek MHP East & West OK 380 40
Longhorn Estates Water System NM 379 264
Church of Troy OH 359 100
Gurleen Petroleum Dba Angel Food IN 352 108
Leroys Mobile Home Park TX 352 60
Route 654 Good to Go PA 351 25
Raton Pass Camp NM 348 35
Hickory Hills Mobile Home Park - Well #2 IN 344 40
Midway Pines RV Park TX 344 132
Lakeview Christian Center IN 334 62
Circle H MHP NC 334 68
Cassandra Water System NM 330 34
Highland Meadows Estates Mdwca NM 329 43
Skywater WSC TX 328 140
Home Church IN 320 129
The Country Mart NY 320 129
Williams Trailer Park TX 307 157
Goshen Family Restaurant IN 306 108
Hill Top Cafe TX 303 300

Context: understanding water quality data · is my water safe?

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

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.