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EPA SDWIS

Simazine in Drinking Water

8,903 public water systems carry at least one Simazine violation - wide footprint (> 8,691 systems).

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EPA contaminant code: 2037

Total Violations
48,645
Systems Affected
8,903
Health-Based %
0.1%
Violations / System
5.5

Simazine standing, mid-volume SDWIS third

Simazine lands in the middle third by violation volume (48,645), 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)). 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 #54 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

Di(2-ethylhexyl) phthalate (48,493) Chromium (49,133) LASSO (49,306) Toxaphene (47,945)

Nearest by systems affected

Antimony, Total (8,855 systems) Thallium, Total (8,780 systems) Beryllium, Total (8,691 systems) Pentachlorophenol (8,602 systems)

Simazine: mixed health vs monitoring split

0.1% health-based · 99.9% monitoring/reporting across 48,645 records.

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

Most Affected Water Systems

System State Violations Population
Pinnacle Water Association WV 188 85
Salem Heights Estate PA 157 62
Congregation Ohr Menachem PA 149 30
Coal Mountain Water WV 149 80
Warminster Municipal Authority PA 135 40,000
Lewis Co Water Dist #2 WA 126 1,983
Skyview Estates IL 124 56
Prague OK 117 2,395
Marble Water System WA 105 94
Frankfort Psd WV 99 6,747
Ambler Boro Water Dept PA 95 20,000
Dabob Cove Community WA 94 24
27 Maple Drive CT 88 38
PA American Audubon PA 85 8,200
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
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
Paradise Stream Resor PA 60 774
Indian Creek Valley Water Auth PA 60 7,000
Lewis River Golf Course WA 60 300
Willow Springs MHP IN 58 25
Tooele City Water System UT 56 37,100
Taggares Fruit Co WA 55 152
Plymouth Community Church IN 53 90
Franklin Water Systems 3 TX 53 201

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.