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EPA SDWIS

Heptachlor in Drinking Water

5.5 violations per affected system (45,763 across 8,396) - mid load (≤ 5.8 violations per affected system).

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EPA contaminant code: 2065

Total Violations
45,763
Systems Affected
8,396
Health-Based %
0%
Violations / System
5.5

Heptachlor standing, mid-volume SDWIS third

Heptachlor lands in the middle third by violation volume (45,763), 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 5.5 violations per affected system (mid load (≤ 5.8 violations per affected system)). None of the recorded Heptachlor violations in this extract are classified health-based; the trail is procedural. Among 157 indexable contaminants, this page is #62 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) Endrin (46,142) Picloram (45,178) Chlordane (46,503)

Nearest by systems affected

Di(2-ethylhexyl) phthalate (8,357 systems) Pentachlorophenol (8,602 systems) Hexachlorocyclopentadiene (8,174 systems) Carbofuran (8,168 systems)

Heptachlor: monitoring/reporting trail

0% health-based · 100.0% monitoring/reporting across 45,763 records.

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

Most Affected Water Systems

System State Violations Population
Pinnacle Water Association WV 188 85
Salem Heights Estate PA 160 62
Congregation Ohr Menachem PA 149 30
Coal Mountain Water WV 149 80
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
Frankfort Psd WV 100 6,747
Dabob Cove Community WA 94 24
27 Maple Drive CT 88 38
Aqua PA Sun Valley PA 79 120
Vista del Rio Mobile Home Park WA 75 352
Neshaminy Manor Center PA 74 2,100
Springhill Park Subdivision MT 72 90
PA American Audubon PA 72 8,200
Christ Mission Lutheran Church IL 70 150
Willow Springs MHP IN 66 25
Helena RV and Mobile Home Park MT 66 250
Save a Pet IL 64 50
Oilton OK 64 1,435
Seneca Trail Christian Academy WV 64 100
Malta City Of MT 63 1,800
Congregation Beth Judea IL 62 25
Ambler Boro Water Dept PA 60 20,000
Paradise Stream Resor PA 60 774
Lewis River Golf Course WA 60 300
Taleem Ul Haq IL 56 100
Tooele City Water System UT 56 37,100
Taggares Fruit Co WA 55 152

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.