PlainWater
Contaminants →
EPA SDWIS

Endrin in Drinking Water

9,348 public water systems carry at least one Endrin violation - wide footprint (> 8,691 systems).

Browse all SDWIS contaminants →

EPA contaminant code: 2005

Total Violations
46,142
Systems Affected
9,348
Health-Based %
0.1%
Violations / System
4.9

Endrin standing, mid-volume SDWIS third

Endrin lands in the middle third by violation volume (46,142), 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 4.9 violations per affected system (mid load (≤ 5.8 violations per affected system)). Health-based share is only 0.1% - almost all of this analyte's trail is monitoring/reporting rather than MCL exceedance. Among 157 indexable contaminants, this page is #60 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

Heptachlor epoxide (45,884) Chlordane (46,503) Heptachlor (45,763) Picloram (45,178)

Nearest by systems affected

LEAD AND COPPER RULE REVISIONS (9,285 systems) Atrazine (9,462 systems) Toxaphene (9,474 systems) 2,4-D (9,509 systems)

Endrin: mixed health vs monitoring split

0.1% health-based · 99.9% monitoring/reporting across 46,142 records.

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

Most Affected Water Systems

System State Violations Population
Salem Heights Estate PA 161 62
Congregation Ohr Menachem PA 146 30
Lewis Co Water Dist #2 WA 126 1,983
Skyview Estates IL 124 56
Prague OK 111 2,395
Marble Water System WA 105 94
Dabob Cove Community WA 94 24
27 Maple Drive CT 88 38
Aqua PA Sun Valley PA 80 120
Bella Vista City Water System AZ 77 20,045
Neshaminy Manor Center PA 77 2,100
Vista del Rio Mobile Home Park WA 75 352
PA American Audubon PA 73 8,200
Willow Springs MHP IN 72 25
Springhill Park Subdivision MT 72 90
Helena RV and Mobile Home Park MT 66 250
Oilton OK 64 1,435
Seneca Trail Christian Academy WV 64 100
Malta City Of MT 63 1,800
Ambler Boro Water Dept PA 60 20,000
Paradise Stream Resor PA 60 774
Lewis River Golf Course WA 60 300
Tooele City Water System UT 56 37,100
Taggares Fruit Co WA 55 152
Plymouth Community Church IN 53 90
Indian Creek Valley Water Auth PA 53 7,000
Franklin Water Systems 3 TX 53 201
PSP Toledo LLC WA 53 31
Manhasset Lakeville WD NY 52 43,000
Criswell Court MHP IL 50 94

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.