What is Chlordane in drinking water?

Chlordane averages 5.5 violations per affected system (46,503 total / 8,465 systems) in the EPA SDWIS extract.

How many water systems have Chlordane violations?

8,465 systems sit in the mid footprint band (mid footprint (≤ 8,691 systems)).

Are Chlordane violations dangerous?

In this extract, 0% are health-based. Recorded findings are monitoring/reporting class, not MCL exceedances.

Where does Chlordane sit in the national contaminant ledger?

#59 of 157 indexable contaminants by violation volume - middle-third volume (≤ 49,133 violations), mid load (≤ 5.8 violations per affected system).

Where does this contaminant data come from?

EPA Safe Drinking Water Information System (SDWIS) quarterly extracts. Counts are cumulative compliance records, not a live risk score for a single tap.

Contaminants →

EPA SDWIS

Chlordane in Drinking Water

Compiled by PlainWater · May 15, 2026

5.5 violations per affected system (46,503 across 8,465) - mid load (≤ 5.8 violations per affected system).

Browse all SDWIS contaminants →

EPA contaminant code: 2959

Total Violations

46,503

Systems Affected

8,465

Health-Based %

Violations / System

5.5

Chlordane standing, mid-volume SDWIS third

Chlordane lands in the middle third by violation volume (46,503), 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 Chlordane violations in this extract are classified health-based; the trail is procedural. Among 157 indexable contaminants, this page is #59 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

Endrin (46,142) Heptachlor epoxide (45,884) Heptachlor (45,763) Pentachlorophenol (47,460)

Nearest by systems affected

Picloram (8,434 systems) Di(2-ethylhexyl) phthalate (8,357 systems) Beryllium, Total (8,691 systems) Hexachlorocyclopentadiene (8,174 systems)

Chlordane: monitoring/reporting trail

0% health-based · 100.0% monitoring/reporting across 46,503 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
Coal Mountain Water	WV	149	80
Congregation Ohr Menachem	PA	148	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
Frankfort Psd	WV	101	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
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
Paradise Stream Resor	PA	63	774
Congregation Beth Judea	IL	62	25
Nwwa Warrington Township	PA	61	21,588
Ambler Boro Water Dept	PA	60	20,000
Lewis River Golf Course	WA	60	300
Indian Creek Valley Water Auth	PA	58	7,000
PA American Audubon	PA	57	8,200
Taleem Ul Haq	IL	56	100

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.