Community Water System · PWSID 083090012

Pryor Water System

Serves 406 peopleGroundwaterOwner: Native AmericanCrow Agency, Montana

1 open treatment violation.

Open for: Groundwater Rule. EPA counts treatment-technique violations as health-based: a required protective step was not done. It is not a measurement of contamination.

On record since 2006: 162 violations. 2 treatment lapses · 156 missed or late tests · 4 notices or reports. Most recent began 2024-10-01.

None of them is a measurement of contaminated water.

For this year's test results, ask the utility for its annual Consumer Confidence Report. Every community system must publish one.

0Over the limit

2Treatment lapse1 open

156Missed or late test1 open

4Notice or report

More violations on record than 99% of active water systems in Montana. Small systems with no staff chemist often rack up missed-test violations; big utilities rarely do.

The record, year by year

One square ≈ 11 violations (rounded up), by the year they began. Empty columns are years with nothing on EPA's record.

1% treatment lapse · 296% missed or late test · 1562% notice or report · 4

Across Montana, 85% of violations are missed or late tests and 3% are water over a limit.

Lead & copper at the tap

Utilities sample taps in homes most likely to have lead pipes, and report the 90th-percentile result: 9 in 10 homes sampled came in at or below this number. Above the red line (the action level) the utility must act. The action level is not a safe level; EPA's health goal for lead is zero. EPA's file does not date these results, so they are shown highest first.

Lead, 90th percentile 5 results on file · action level 15 ppb

2 ppb

1 ppb

0 ppb

Open now (2)

2024-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/ROpen
2018-11-02Groundwater RuleFailure To Address DeficiencyOpen

Every violation on record

2024-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/ROpen
2023-12-30Lead and Copper RuleLead Consumer NoticeBack in compliance
2023-12-07E. ColiMonitoring, Source Water (GWR)Back in compliance
2023-10-01Consumer Confidence RuleCCR Inadequate ReportingBack in compliance
2023-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance
2023-01-01ChlorineMonitoring and Reporting (DBP)Back in compliance
2022-12-30Lead and Copper RuleLead Consumer NoticeBack in compliance
2022-07-01ChlorineMonitoring and Reporting (DBP)Back in compliance
2022-01-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Period ended · no return to compliance on file
2022-01-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Period ended · no return to compliance on file
2020-11-28Groundwater RuleFailure To Address DeficiencyBack in compliance
2020-10-01Lead and Copper RuleFollow-up Or Routine LCR Tap M/RBack in compliance
2020-04-01Revised Total Coliform RuleMONBack in compliance
2020-01-01Carbofuran ×2Monitoring, RegularBack in compliance
2020-01-01Di(2-ethylhexyl) adipate ×2Monitoring, RegularBack in compliance
2020-01-01Hexachlorobenzene ×2Monitoring, RegularBack in compliance
2020-01-01Diquat ×2Monitoring, RegularBack in compliance
2020-01-01Endothall ×2Monitoring, RegularBack in compliance
2020-01-01Di(2-ethylhexyl) phthalate ×2Monitoring, RegularBack in compliance
2020-01-01Bhc-Gamma ×2Monitoring, RegularBack in compliance
2020-01-01Picloram ×2Monitoring, RegularBack in compliance
2020-01-01Lasso ×2Monitoring, RegularBack in compliance
2020-01-012, 4-D ×2Monitoring, RegularBack in compliance
2020-01-011, 2-Dibromo-3-Chloropropane ×2Monitoring, RegularBack in compliance
2020-01-01Oxamyl ×2Monitoring, RegularBack in compliance

Show the other 74 entries

2020-01-01Atrazine ×2Monitoring, RegularBack in compliance
2020-01-01Toxaphene ×2Monitoring, RegularBack in compliance
2020-01-01Heptachlor epoxide ×2Monitoring, RegularBack in compliance
2020-01-01Benzo(a)pyrene ×2Monitoring, RegularBack in compliance
2020-01-01Methoxychlor ×2Monitoring, RegularBack in compliance
2020-01-01Dinoseb ×2Monitoring, RegularBack in compliance
2020-01-01Hexachlorocyclopentadiene ×2Monitoring, RegularBack in compliance
2020-01-01Dalapon ×2Monitoring, RegularBack in compliance
2020-01-01Glyphosate ×2Monitoring, RegularBack in compliance
2020-01-01Heptachlor ×2Monitoring, RegularBack in compliance
2020-01-01Total Polychlorinated Biphenyls (PCB) ×2Monitoring, RegularBack in compliance
2020-01-01Chlordane ×2Monitoring, RegularBack in compliance
2020-01-01Endrin ×2Monitoring, RegularBack in compliance
2020-01-01Simazine ×2Monitoring, RegularBack in compliance
2020-01-012, 4, 5-Tp ×2Monitoring, RegularBack in compliance
2020-01-01Pentachlorophenol ×2Monitoring, RegularBack in compliance
2020-01-01Ethylene Dibromide ×2Monitoring, RegularBack in compliance
2020-01-01Chromium ×2Monitoring, RegularBack in compliance
2020-01-01Nickel ×2Monitoring, RegularBack in compliance
2020-01-01Barium ×2Monitoring, RegularBack in compliance
2020-01-01Fluoride ×2Monitoring, RegularBack in compliance
2020-01-01Sodium ×2Monitoring, RegularBack in compliance
2020-01-01Cyanide ×2Monitoring, RegularBack in compliance
2020-01-01Beryllium, Total ×2Monitoring, RegularBack in compliance
2020-01-01Arsenic ×2Monitoring, RegularBack in compliance
2020-01-01Cadmium ×2Monitoring, RegularBack in compliance
2020-01-01Thallium, Total ×2Monitoring, RegularBack in compliance
2020-01-01Selenium ×2Monitoring, RegularBack in compliance
2020-01-01Antimony, Total ×2Monitoring, RegularBack in compliance
2020-01-01Mercury ×2Monitoring, RegularBack in compliance
2020-01-01Styrene ×2Monitoring, RegularBack in compliance
2020-01-01Ethylbenzene ×2Monitoring, RegularBack in compliance
2020-01-01Toluene ×2Monitoring, RegularBack in compliance
2020-01-01Benzene ×2Monitoring, RegularBack in compliance
2020-01-01Chlorobenzene ×2Monitoring, RegularBack in compliance
2020-01-01Tetrachloroethylene ×2Monitoring, RegularBack in compliance
2020-01-011,1,2-Trichloroethane ×2Monitoring, RegularBack in compliance
2020-01-01Trichloroethylene ×2Monitoring, RegularBack in compliance
2020-01-011,2-Dichloropropane ×2Monitoring, RegularBack in compliance
2020-01-01Carbon tetrachloride ×2Monitoring, RegularBack in compliance
2020-01-011,1,1-Trichloroethane ×2Monitoring, RegularBack in compliance
2020-01-011,2-Dichloroethane ×2Monitoring, RegularBack in compliance
2020-01-01trans-1,2-Dichloroethylene ×2Monitoring, RegularBack in compliance
2020-01-011,1-Dichloroethylene ×2Monitoring, RegularBack in compliance
2020-01-01Vinyl chloride ×2Monitoring, RegularBack in compliance
2020-01-01p-Dichlorobenzene ×2Monitoring, RegularBack in compliance
2020-01-01o-Dichlorobenzene ×2Monitoring, RegularBack in compliance
2020-01-01Dichloromethane ×2Monitoring, RegularBack in compliance
2020-01-01Xylenes, Total ×2Monitoring, RegularBack in compliance
2020-01-01cis-1,2-Dichloroethylene ×2Monitoring, RegularBack in compliance
2020-01-011,2,4-Trichlorobenzene ×2Monitoring, RegularBack in compliance
2020-01-01Nitrate-NitriteMonitoring, RegularPeriod ended · no return to compliance on file
2019-03-01Revised Total Coliform RuleMONBack in compliance
2019-01-01Revised Total Coliform RuleMONBack in compliance
2018-12-01Revised Total Coliform RuleMONBack in compliance
2018-11-02Groundwater RuleFailure To Address DeficiencyOpen
2018-11-01Revised Total Coliform RuleMONBack in compliance
2018-10-01Revised Total Coliform RuleMONBack in compliance
2018-09-01Revised Total Coliform RuleMONBack in compliance
2018-08-01Revised Total Coliform RuleMONBack in compliance
2018-07-01Revised Total Coliform RuleMONBack in compliance
2018-06-01Revised Total Coliform RuleMONBack in compliance
2018-04-01Revised Total Coliform RuleMONBack in compliance
2018-03-01Revised Total Coliform RuleMONBack in compliance
2018-02-01Revised Total Coliform RuleMONBack in compliance
2018-01-01Total Haloacetic Acids (HAA5)Monitoring and Reporting (DBP)Back in compliance
2018-01-01Trihalomethanes (TTHM)Monitoring and Reporting (DBP)Back in compliance
2018-01-01Nitrate-NitriteMonitoring, RegularBack in compliance
2017-10-01Revised Total Coliform RuleMONBack in compliance
2017-02-01Revised Total Coliform RuleMONBack in compliance
2017-01-01Nitrate-NitriteMonitoring, RegularBack in compliance
2014-08-28E. ColiMonitoring, Source Water (GWR)Back in compliance
2006-10-01Consumer Confidence RuleCCR Inadequate ReportingBack in compliance
2006-07-01Consumer Confidence RuleCCR Complete Failure to ReportBack in compliance

System details

Population served	406
Service connections	98
Water source	Groundwater
System type	Community Water System
Owner	Native American
Status	Active
City	Crow Agency
EPA ZIP on file	59022

Areas served

Reading this record

Pryor Water System is a community water system that draws from groundwater and serves about 406 people in Crow Agency, Montana. Everything above comes from the EPA's Safe Drinking Water Information System (SDWIS), where states report every violation by every public water system.

Four kinds of violation. Only one is a measurement of the water: over the limit means a test came back above a legal maximum (an MCL). A treatment lapse means a required protective step was not done, such as disinfection, filtration, fixing a defect an inspector found, or filing a lead-pipe inventory. A missed or late test means a required test was skipped or never reported. That is the most common kind, and the most misread: it does not mean the water was bad, and it does not mean the water was fine. Notices and reports covers public notices and the annual Consumer Confidence Report.

Status. “Back in compliance” means the state recorded a return to compliance. “Period ended” means the violation's compliance period is over but no return to compliance was ever filed, which is common in older records. EPA's federal copy lags state records by months, so call the utility for anything current.