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DELAWARE

Oklahoma — Community Water System — PWSID: OK1021502

System Information

PWSIDOK1021502
System NameDELAWARE
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
CityDELAWARE
ZIP Code74027
AddressShannon Duncan, Chairman
OrganizationDELAWARE
Phone918-467-3218

Population & Service

Population Served456
Service Connections358

Drinking Water Violations (1,080)

This water system has 1,080 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 — Lead and Copper Rule MR No No — TT — Unaddressed — Lead and Copper Rule
Jul 1, 2025 — Lead and Copper Rule MR No No — TT — Unaddressed — Lead and Copper 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 Jun 30, 2025 CARBON, TOTAL TT Yes No .42 RATIO TT — Archived Jun 30, 2025 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2025 Apr 30, 2025 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Archived Apr 30, 2025 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Apr 1, 2025 Apr 30, 2025 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Archived Apr 30, 2025 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Apr 1, 2025 Jun 30, 2025 CARBON, TOTAL TT Yes No .42 RATIO TT — Archived Jun 30, 2025 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2025 Jun 30, 2025 CARBON, TOTAL TT Yes No .42 RATIO TT — Archived Jun 30, 2025 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2025 Mar 31, 2025 CARBON, TOTAL TT Yes No — TT — Archived Mar 31, 2025 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2025 Mar 31, 2025 CARBON, TOTAL TT Yes No — TT — Archived Mar 31, 2025 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2025 — Lead and Copper Rule MR No No — TT — Unaddressed — Lead and Copper Rule
Jan 1, 2025 — Lead and Copper Rule MR No No — TT — Unaddressed — Lead and Copper Rule
Jan 1, 2025 — Lead and Copper Rule MR No No — TT — Unaddressed — Lead and Copper Rule
Dec 1, 2024 Dec 31, 2024 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Dec 31, 2024 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Dec 1, 2024 Dec 31, 2024 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Dec 31, 2024 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Dec 1, 2024 Dec 31, 2024 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Dec 31, 2024 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Dec 1, 2024 Dec 31, 2024 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Dec 31, 2024 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Oct 1, 2024 Dec 31, 2024 CARBON, TOTAL TT Yes No .27 RATIO TT — Archived Dec 31, 2024 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2024 Dec 31, 2024 CARBON, TOTAL TT Yes No .27 RATIO TT — Archived Dec 31, 2024 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2024 Oct 31, 2024 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Oct 31, 2024 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Oct 1, 2024 Dec 31, 2024 CARBON, TOTAL TT Yes No .27 RATIO TT — Archived Dec 31, 2024 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2024 Oct 31, 2024 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Oct 31, 2024 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Oct 1, 2024 Dec 31, 2024 CARBON, TOTAL TT Yes No .27 RATIO TT — Archived Dec 31, 2024 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2024 Oct 31, 2024 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Oct 31, 2024 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Oct 1, 2024 Oct 31, 2024 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Oct 31, 2024 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Sep 1, 2024 Sep 30, 2024 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Sep 30, 2024 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Sep 1, 2024 Sep 30, 2024 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Sep 30, 2024 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Sep 1, 2024 Sep 30, 2024 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Sep 30, 2024 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Sep 1, 2024 Sep 30, 2024 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Sep 30, 2024 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Aug 30, 2024 — Public Notice Other No No — — — Addressed — Public Notice Rule and Revised PN Rule
Aug 30, 2024 — Public Notice Other No No — — — Addressed — Public Notice Rule and Revised PN Rule
Aug 1, 2024 Aug 31, 2024 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Aug 31, 2024 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Aug 1, 2024 Aug 31, 2024 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Aug 31, 2024 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Aug 1, 2024 Aug 31, 2024 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Aug 31, 2024 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Aug 1, 2024 Aug 31, 2024 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Aug 31, 2024 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Aug 1, 2024 Aug 31, 2024 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Aug 31, 2024 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Jul 21, 2024 — Public Notice Other No No — — — Addressed — Public Notice Rule and Revised PN Rule
Jul 1, 2024 Sep 30, 2024 CARBON, TOTAL TT Yes No .26 RATIO TT — Archived Sep 30, 2024 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2024 — Lead and Copper Rule MR No No — TT — Addressed — Lead and Copper Rule
Jul 1, 2024 Jul 31, 2024 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Jul 31, 2024 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Jul 1, 2024 Jul 31, 2024 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Jul 31, 2024 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Jul 1, 2024 — Lead and Copper Rule MR No No — TT — Addressed — Lead and Copper Rule
Jul 1, 2024 — Lead and Copper Rule MR No No — TT — Addressed — Lead and Copper Rule
Jul 1, 2024 Jul 31, 2024 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Jul 31, 2024 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Jul 1, 2024 — Consumer Confidence Rule Other No No — — — Resolved Jul 31, 2024 Consumer Confidence Rule
Jul 1, 2024 — Consumer Confidence Rule Other No No — — — Resolved Jul 31, 2024 Consumer Confidence Rule
Jul 1, 2024 — Consumer Confidence Rule Other No No — — — Resolved Jul 31, 2024 Consumer Confidence Rule
Jul 1, 2024 — Lead and Copper Rule MR No No — TT — Addressed — Lead and Copper Rule
Jul 1, 2024 Jul 31, 2024 Interim Enhanced Surface Water Treatment Rule MR No Yes — — — Resolved Jul 31, 2024 Interim and Long Term 1 Enhanced Surface Water Treatment 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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