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EPA SDWIS

Coliform (Pre-TCR) in Drinking Water

4.1 violations per affected system (716 across 174) - mid load (≤ 5.8 violations per affected system).

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EPA contaminant code: 3000

Total Violations
716
Systems Affected
174
Health-Based %
0%
Violations / System
4.1

Coliform (Pre-TCR) standing, mid-volume SDWIS third

Coliform (Pre-TCR) lands in the middle third by violation volume (716), large enough for peer comparisons but not one of the handful of analytes that dominate the fleet-wide SDWIS ledger. Load sits mid-pack at 4.1 violations per affected system (mid load (≤ 5.8 violations per affected system)). None of the recorded Coliform (Pre-TCR) violations in this extract are classified health-based; the trail is procedural. Among 157 indexable contaminants, this page is #101 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

Lead (324) Tritium (315) 38-STRONTIUM-90 (286) COPPER, FREE (253)

Nearest by systems affected

Cryptosporidium (202 systems) Bromate (140 systems) Chlorine dioxide (136 systems) Turbidity (126 systems)

Coliform (Pre-TCR): monitoring/reporting trail

0% health-based · 100.0% monitoring/reporting across 716 records.

Health-based (0%) Monitoring/Reporting (100.0%)

Most Affected Water Systems

System State Violations Population
Hoover Dam NV 47 3,000
Moapa Valley Water District NV 35 8,500
Primm Valley Casino Resorts NV 30 7,000
NE Mississippi Co Water Assoc AR 27 1,040
Maunaloa-Kaluakoi HI 25 1,000
River Bend Park POA AR 21 523
Lumberton Mdwca NM 21 223
Bermuda Palms Management LLC NV 16 60
Blue Diamond Water Company NV 15 527
Glenaire Subdivision VA 13 72
Old Bella Vista POA AR 12 83
Harris Springs Ranch NV 12 40
Creech Air Force Base NV 11 4,200
Barn Restaurant An0 RI 11 125
Ranch House NV 10 182
Rainbow Gardens Water Users NV 9 45
Indian Springs Water Co Inc NV 9 900
Desert Southwest Conference NV 9 32
Olowalu HI 9 100
Kualapuu HI 9 500
Bosque Gardens Mdwca NM 8 141
Pine Grove Mobile Home Park VA 8 80
Spencer W Kimball Scout Reservation NV 8 208
Mountain Springs Bar Inc NV 8 80
Blue Diamond Water Co Op Inc NV 8 85
Camp Lady of the Snows NV 7 60
Nps Boulder Beach NV 7 690
Equestrian Estates Co Op Water Assoc NV 7 108
Cushman Water System AR 6 1,423
Costilla Mdwca NM 6 244

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.