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EPA SDWIS Dense per-system load

Chloramine in Drinking Water

7.9 violations per affected system (2,449 across 310) - dense load (> 5.8 violations per affected system).

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EPA contaminant code: 1006

Total Violations
2,449
Systems Affected
310
Health-Based %
5%
Violations / System
7.9

Chloramine standing, mid-volume SDWIS third

Chloramine lands in the middle third by violation volume (2,449), large enough for peer comparisons but not one of the handful of analytes that dominate the fleet-wide SDWIS ledger. Load is concentrated: 7.9 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 5% - almost all of this analyte's trail is monitoring/reporting rather than MCL exceedance. Among 157 indexable contaminants, this page is #96 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

Cryptosporidium (2,446) COLIPHAGE (2,523) Stage 2 Disinfectants and Disinfection Byproducts Rule (3,102) Chlorite (3,255)

Nearest by systems affected

Coliform (Pre-TCR) (174 systems) Bromate (140 systems) 38-STRONTIUM-90 (138 systems) Chlorine dioxide (136 systems)

Chloramine: mixed health vs monitoring split

5% health-based · 95.0% monitoring/reporting across 2,449 records.

Health-based (5%) Monitoring/Reporting (95.0%)

Most Affected Water Systems

System State Violations Population
Acorn Acres MHP IL 77 52
Forge at the Lake IL 55 387
Forbes City Of ND 49 53
Almont City Of ND 49 122
Ross City Of ND 47 97
Carver Gardens VA 44 163
Nelson Park VA 44 530
Queens Lake System VA 44 1,375
York Terrace System VA 44 755
Longton, City Of KS 32 277
Riverview Heights ND 32 200
Zeigler IL 31 1,774
Regent City Of ND 31 160
Willow Creek North MHP IL 25 250
West River Water and Sewer ND 23 450
Galatia IL 22 989
Menard Correctional Center IL 21 2,950
New Hradec Waterworks ND 21 60
Vergennes IL 20 648
Bowdon City Of ND 20 131
Blm Gw MHP, LLC IL 19 390
Inspire Communities-Springbrook ND 19 300
Golva City Of ND 18 61
Sykeston City Of ND 18 117
Trenton Water Users Assoc ND 18 840
Noonan City Of ND 17 121
Longacre Estates MHP IL 16 375
Nilwood IL 16 1,394
Crainville IL 16 1,711
MA Patout & Son Sugar Mill Water System LA 16 170

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.