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ROCKY BOY AGENCY WATER SYSTEM

Montana — Community Water System — PWSID: 083090079

System Information

PWSID083090079
System NameROCKY BOY AGENCY WATER SYSTEM
System TypeCommunity Water System
Water SourceGround Water
Activity StatusActive
Owner TypeNative American
EPA Region08
Serves SchoolYes
WholesalerNo
First ReportedMar 4, 1980
Last ReportedNov 17, 2025

Location & Contact

StateMontana
CityBOX ELDER
ZIP Code59521
Address—
OrganizationNAULT, TIM
Phone406-301-1852

Population & Service

Population Served1,442
Service Connections150

Drinking Water Violations (92)

This water system has 92 violations recorded in the EPA SDWIS database.

Begin Date End Date Contaminant Category Health-Based Major Measured Federal MCL State MCL Status Return to Compliance Rule
Jan 1, 2023 Mar 31, 2023 Asbestos MR No Yes — 7 MFL — Resolved Mar 31, 2023 Inorganic Chemicals
Oct 1, 2022 Dec 31, 2022 Asbestos MR No Yes — 7 MFL — Resolved Dec 31, 2022 Inorganic Chemicals
Jul 1, 2022 Sep 30, 2022 Asbestos MR No Yes — 7 MFL — Resolved Sep 30, 2022 Inorganic Chemicals
Apr 1, 2020 Jun 30, 2020 Toluene MR No Yes — 1 mg/L — Resolved Jun 30, 2020 Volatile Organic Chemicals
Apr 1, 2020 Jun 30, 2020 Xylenes, Total MR No Yes — 10 mg/L — Resolved Jun 30, 2020 Volatile Organic Chemicals
Jul 25, 2015 — Groundwater Rule TT Yes No — — — Resolved Dec 9, 2019 Ground Water Rule
Jul 1, 2014 — Consumer Confidence Rule Other No No — — — Resolved Jun 24, 2015 Consumer Confidence Rule
Jul 1, 2014 — Consumer Confidence Rule Other No No — — — Resolved Jun 24, 2015 Consumer Confidence Rule
Jan 1, 2014 Dec 31, 2016 Pentachlorophenol MR No Yes — 0.001 mg/L — Resolved Dec 31, 2016 Synthetic Organic Chemicals
Jan 1, 2014 Dec 31, 2016 LASSO MR No Yes — — — Resolved Dec 31, 2016 Synthetic Organic Chemicals
Jan 1, 2014 Dec 31, 2016 1,1,2-Trichloroethane MR No Yes — 0.005 mg/L — Resolved Dec 31, 2016 Volatile Organic Chemicals
Jan 1, 2014 Dec 31, 2016 1,1-Dichloroethylene MR No Yes — 0.007 mg/L — Resolved Dec 31, 2016 Volatile Organic Chemicals
Jan 1, 2014 Dec 31, 2016 trans-1,2-Dichloroethylene MR No Yes — 0.1 mg/L — Resolved Dec 31, 2016 Volatile Organic Chemicals
Jan 1, 2014 Dec 31, 2016 Chlordane MR No Yes — 0.002 mg/L — Resolved Dec 31, 2016 Synthetic Organic Chemicals
Jan 1, 2014 Dec 31, 2016 Total Polychlorinated Biphenyls (PCB) MR No Yes — 0.0005 mg/L — Resolved Dec 31, 2016 Synthetic Organic Chemicals
Jan 1, 2014 Dec 31, 2016 Benzo(a)pyrene MR No Yes — 0.0002 mg/L — Resolved Dec 31, 2016 Synthetic Organic Chemicals
Jan 1, 2014 Dec 31, 2016 2,4,5-TP MR No Yes — 0.05 mg/L — Resolved Dec 31, 2016 Synthetic Organic Chemicals
Jan 1, 2014 Dec 31, 2016 2,4-D MR No Yes — 0.07 mg/L — Resolved Dec 31, 2016 Synthetic Organic Chemicals
Jan 1, 2014 Dec 31, 2016 Heptachlor MR No Yes — 0.0004 mg/L — Resolved Dec 31, 2016 Synthetic Organic Chemicals
Jan 1, 2014 Dec 31, 2016 2,3,7,8-TCDD MR No Yes — 0.00000003 mg/L — Resolved Dec 31, 2016 Synthetic Organic Chemicals
Jan 1, 2014 Dec 31, 2016 Ethylbenzene MR No Yes — 0.7 mg/L — Resolved Dec 31, 2016 Volatile Organic Chemicals
Jan 1, 2014 Dec 31, 2016 1,2-DIBROMO-3-CHLOROPROPANE MR No Yes — 0.0002 mg/L — Resolved Dec 31, 2016 Synthetic Organic Chemicals
Jan 1, 2014 Dec 31, 2016 o-Dichlorobenzene MR No Yes — 0.6 mg/L — Resolved Dec 31, 2016 Volatile Organic Chemicals
Jan 1, 2014 Dec 31, 2016 Dalapon MR No Yes — 0.2 mg/L — Resolved Dec 31, 2016 Synthetic Organic Chemicals
Jan 1, 2014 Dec 31, 2016 Dinoseb MR No Yes — 0.007 mg/L — Resolved Dec 31, 2016 Synthetic Organic Chemicals
Jan 1, 2014 Dec 31, 2016 Toluene MR No Yes — 1 mg/L — Resolved Dec 31, 2016 Volatile Organic Chemicals
Jan 1, 2014 Dec 31, 2016 Heptachlor epoxide MR No Yes — 0.0002 mg/L — Resolved Dec 31, 2016 Synthetic Organic Chemicals
Jan 1, 2014 Dec 31, 2016 CHLOROBENZENE MR No Yes — 0.1 mg/L — Resolved Dec 31, 2016 Volatile Organic Chemicals
Jan 1, 2014 Dec 31, 2016 cis-1,2-Dichloroethylene MR No Yes — 0.07 mg/L — Resolved Dec 31, 2016 Volatile Organic Chemicals
Jan 1, 2014 Dec 31, 2016 Carbon tetrachloride MR No Yes — 0.005 mg/L — Resolved Dec 31, 2016 Volatile Organic Chemicals
Jan 1, 2014 Dec 31, 2016 Tetrachloroethylene MR No Yes — 0.005 mg/L — Resolved Dec 31, 2016 Volatile Organic Chemicals
Jan 1, 2014 Dec 31, 2016 Di(2-ethylhexyl) phthalate MR No Yes — 0.006 mg/L — Resolved Dec 31, 2016 Synthetic Organic Chemicals
Jan 1, 2014 Dec 31, 2016 CYANIDE MR No Yes — 0.2 mg/L — Resolved Dec 31, 2016 Inorganic Chemicals
Jan 1, 2014 Dec 31, 2016 DICHLOROMETHANE MR No Yes — 0.005 mg/L — Resolved Dec 31, 2016 Volatile Organic Chemicals
Jan 1, 2014 Dec 31, 2016 Trichloroethylene MR No Yes — 0.005 mg/L — Resolved Dec 31, 2016 Volatile Organic Chemicals
Jan 1, 2014 Dec 31, 2016 Glyphosate MR No Yes — 0.7 mg/L — Resolved Dec 31, 2016 Synthetic Organic Chemicals
Jan 1, 2014 Dec 31, 2016 1,1,1-Trichloroethane MR No Yes — 0.2 mg/L — Resolved Dec 31, 2016 Volatile Organic Chemicals
Jan 1, 2014 Dec 31, 2016 HEXACHLOROBENZENE MR No Yes — 0.001 mg/L — Resolved Dec 31, 2016 Synthetic Organic Chemicals
Jan 1, 2014 Dec 31, 2016 p-Dichlorobenzene MR No Yes — 0.075 mg/L — Resolved Dec 31, 2016 Volatile Organic Chemicals
Jan 1, 2014 Dec 31, 2016 Picloram MR No Yes — 0.5 mg/L — Resolved Dec 31, 2016 Synthetic Organic Chemicals
Jan 1, 2014 Dec 31, 2016 ETHYLENE DIBROMIDE MR No Yes — 0.00005 mg/L — Resolved Dec 31, 2016 Synthetic Organic Chemicals
Jan 1, 2014 Dec 31, 2016 1,2,4-Trichlorobenzene MR No Yes — 0.07 mg/L — Resolved Dec 31, 2016 Volatile Organic Chemicals
Jan 1, 2014 Dec 31, 2016 Xylenes, Total MR No Yes — 10 mg/L — Resolved Dec 31, 2016 Volatile Organic Chemicals
Jan 1, 2014 Dec 31, 2016 Atrazine MR No Yes — 0.003 mg/L — Resolved Dec 31, 2016 Synthetic Organic Chemicals
Jan 1, 2014 Dec 31, 2016 Vinyl chloride MR No Yes — 0.002 mg/L — Resolved Dec 31, 2016 Volatile Organic Chemicals
Jan 1, 2014 Dec 31, 2016 1,2-Dichloroethane MR No Yes — 0.005 mg/L — Resolved Dec 31, 2016 Volatile Organic Chemicals
Jan 1, 2014 Dec 31, 2016 1,2-Dichloropropane MR No Yes — 0.005 mg/L — Resolved Dec 31, 2016 Volatile Organic Chemicals
Jan 1, 2014 Dec 31, 2016 Benzene MR No Yes — 0.005 mg/L — Resolved Dec 31, 2016 Volatile Organic Chemicals
Jan 1, 2014 Dec 31, 2016 Styrene MR No Yes — 0.1 mg/L — Resolved Dec 31, 2016 Volatile Organic Chemicals
Jan 1, 2014 Dec 31, 2016 Endrin MR No Yes — 0.002 mg/L — Resolved Dec 31, 2016 Synthetic Organic Chemicals

About This Water System

Public water system data comes from the EPA Safe Drinking Water Information System (SDWIS). Systems with violations must notify customers. Contact your water utility for the latest annual water quality report.

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