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BLACKWELL MUNICIPAL AUTHORITY

Oklahoma — Community Water System — PWSID: OK1021101

System Information

PWSIDOK1021101
System NameBLACKWELL MUNICIPAL AUTHORITY
System TypeCommunity Water System
Water SourceSurface Water
Activity StatusActive
Owner TypeLocal
EPA Region06
Serves SchoolNo
WholesalerNo
First ReportedMar 11, 1980
Last ReportedNov 14, 2025

Location & Contact

StateOklahoma
CityBLACKWELL
ZIP Code74631
AddressT. J. Greenfield, Chairman
OrganizationBLACKWELL MUNICIPAL AUTHORITY
Phone580-363-1177

Population & Service

Population Served7,668
Service Connections3,158

Drinking Water Violations (239)

This water system has 239 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
Jul 1, 2025 Jul 31, 2025 Interim Enhanced Surface Water Treatment Rule TT Yes No — — — Archived Jul 31, 2025 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Jul 1, 2025 Jul 31, 2025 Interim Enhanced Surface Water Treatment Rule TT Yes No — — — Archived Jul 31, 2025 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Jun 1, 2025 Jun 30, 2025 Interim Enhanced Surface Water Treatment Rule TT Yes No — — — Archived Jun 30, 2025 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Jun 1, 2025 Jun 30, 2025 Interim Enhanced Surface Water Treatment Rule TT Yes No — — — Archived Jun 30, 2025 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
May 1, 2025 May 31, 2025 Chlorine dioxide MR No Yes — 0.8 mg/L — Archived May 31, 2025 Stage 1 Disinfectants and Disinfection Byproducts Rule
May 1, 2025 May 31, 2025 Chlorine dioxide MR No Yes — 0.8 mg/L — Archived May 31, 2025 Stage 1 Disinfectants and Disinfection Byproducts Rule
May 1, 2025 May 31, 2025 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Archived May 31, 2025 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
May 1, 2025 May 31, 2025 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Archived May 31, 2025 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Apr 1, 2025 — TTHM MR No No — 0.080 mg/L — Resolved May 6, 2025 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2025 — TTHM MR No No — 0.080 mg/L — Resolved May 6, 2025 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2025 Jan 31, 2025 Interim Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved Jan 31, 2025 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Jan 1, 2025 Jan 31, 2025 Interim Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved Jan 31, 2025 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Jan 1, 2025 Jan 31, 2025 Interim Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved Jan 31, 2025 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Jan 1, 2025 Jan 31, 2025 Interim Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved Jan 31, 2025 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Jun 1, 2024 Jun 30, 2024 Interim Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved Jun 30, 2024 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Jun 1, 2024 Jun 30, 2024 Interim Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved Jun 30, 2024 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Jun 1, 2024 Jun 30, 2024 Interim Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved Jun 30, 2024 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Jun 1, 2024 Jun 30, 2024 Interim Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved Jun 30, 2024 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Mar 1, 2024 Mar 31, 2024 Interim Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved Mar 31, 2024 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Mar 1, 2024 Mar 31, 2024 Interim Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved Mar 31, 2024 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Mar 1, 2024 Mar 31, 2024 Interim Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved Mar 31, 2024 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Mar 1, 2024 Mar 31, 2024 Interim Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved Mar 31, 2024 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Mar 1, 2024 Mar 31, 2024 Interim Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved Mar 31, 2024 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Mar 1, 2024 Mar 31, 2024 Interim Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved Mar 31, 2024 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Mar 1, 2024 Mar 31, 2024 Interim Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved Mar 31, 2024 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Mar 1, 2024 Mar 31, 2024 Interim Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved Mar 31, 2024 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Jan 1, 2023 Mar 31, 2023 TTHM MCL Yes No .085 MG/L 0.080 mg/L .08 Resolved Mar 31, 2023 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2023 Mar 31, 2023 TTHM MCL Yes No .085 MG/L 0.080 mg/L .08 Resolved Mar 31, 2023 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2023 Mar 31, 2023 TTHM MCL Yes No .085 MG/L 0.080 mg/L .08 Resolved Mar 31, 2023 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2023 Mar 31, 2023 TTHM MCL Yes No .085 MG/L 0.080 mg/L .08 Resolved Mar 31, 2023 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2022 Dec 31, 2022 TTHM MCL Yes No .082 MG/L 0.080 mg/L .08 Resolved Dec 31, 2022 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2022 Dec 31, 2022 TTHM MCL Yes No .082 MG/L 0.080 mg/L .08 Resolved Dec 31, 2022 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2022 Dec 31, 2022 TTHM MCL Yes No .082 MG/L 0.080 mg/L .08 Resolved Dec 31, 2022 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2022 Dec 31, 2022 TTHM MCL Yes No .082 MG/L 0.080 mg/L .08 Resolved Dec 31, 2022 Stage 2 Disinfectants and Disinfection Byproducts Rule
Sep 1, 2022 Sep 30, 2022 Surface Water Treatment Rule TT Yes No — — — Resolved Sep 30, 2022 Surface Water Treatment Rule
Sep 1, 2022 Sep 30, 2022 Surface Water Treatment Rule TT Yes No — — — Resolved Sep 30, 2022 Surface Water Treatment Rule
Sep 1, 2022 Sep 30, 2022 Surface Water Treatment Rule TT Yes No — — — Resolved Sep 30, 2022 Surface Water Treatment Rule
Sep 1, 2022 Sep 30, 2022 Surface Water Treatment Rule TT Yes No — — — Resolved Sep 30, 2022 Surface Water Treatment Rule
May 1, 2021 May 31, 2021 Interim Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved May 31, 2021 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
May 1, 2021 May 31, 2021 Interim Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved May 31, 2021 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
May 1, 2021 May 31, 2021 Interim Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved May 31, 2021 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
May 1, 2021 May 31, 2021 Interim Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved May 31, 2021 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Aug 1, 2020 Aug 31, 2020 Chlorite MR No Yes — 1.0 mg/L — Resolved Aug 31, 2020 Stage 1 Disinfectants and Disinfection Byproducts Rule
Aug 1, 2020 Aug 31, 2020 Chlorite MR No Yes — 1.0 mg/L — Resolved Aug 31, 2020 Stage 1 Disinfectants and Disinfection Byproducts Rule
Aug 1, 2020 Aug 31, 2020 Chlorite MR No Yes — 1.0 mg/L — Resolved Aug 31, 2020 Stage 1 Disinfectants and Disinfection Byproducts Rule
Aug 1, 2020 Aug 31, 2020 Chlorite MR No Yes — 1.0 mg/L — Resolved Aug 31, 2020 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2020 Jul 31, 2020 Chlorite MR No Yes — 1.0 mg/L — Resolved Jul 31, 2020 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2020 Jul 31, 2020 Chlorite MR No Yes — 1.0 mg/L — Resolved Jul 31, 2020 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2020 Jul 31, 2020 Chlorite MR No Yes — 1.0 mg/L — Resolved Jul 31, 2020 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2020 Jul 31, 2020 Chlorite MR No Yes — 1.0 mg/L — Resolved Jul 31, 2020 Stage 1 Disinfectants and Disinfection Byproducts Rule

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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