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NICHOLS HILLS

Oklahoma — Community Water System — PWSID: OK2005501

System Information

PWSIDOK2005501
System NameNICHOLS HILLS
System TypeCommunity Water System
Water SourceGround Water
Activity StatusActive
Owner TypeLocal
EPA Region06
Serves SchoolNo
WholesalerNo
First ReportedMar 11, 1980
Last ReportedNov 14, 2025

Location & Contact

StateOklahoma
CityNICHOLS HILLS
ZIP Code73116-6431
AddressDavid White
OrganizationNICHOLS HILLS, CITY OF
Phone405-843-5222

Population & Service

Population Served4,020
Service Connections1,924

Drinking Water Violations (271)

This water system has 271 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, 2025 Dec 31, 2025 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Unaddressed — Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2025 Dec 31, 2025 TTHM MR No Yes — 0.080 mg/L — Unaddressed — Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 17, 2024 — LEAD AND COPPER RULE REVISIONS TT Yes No — — — Resolved Jul 15, 2025 Lead and Copper Rule Revisions
Oct 17, 2024 — LEAD AND COPPER RULE REVISIONS TT Yes No — — — Resolved Jul 15, 2025 Lead and Copper Rule Revisions
Oct 17, 2024 — LEAD AND COPPER RULE REVISIONS RPT No No — — — Resolved Jul 15, 2025 Lead and Copper Rule Revisions
Oct 17, 2024 — LEAD AND COPPER RULE REVISIONS RPT No No — — — Resolved Jul 15, 2025 Lead and Copper Rule Revisions
Jan 1, 2024 Dec 31, 2024 Simazine MR No Yes — 0.004 mg/L — Archived Dec 31, 2024 Synthetic Organic Chemicals
Jan 1, 2024 Dec 31, 2024 Di(2-ethylhexyl) phthalate MR No Yes — 0.006 mg/L — Archived Dec 31, 2024 Synthetic Organic Chemicals
Jan 1, 2024 Dec 31, 2024 HEXACHLOROBENZENE MR No Yes — 0.001 mg/L — Archived Dec 31, 2024 Synthetic Organic Chemicals
Jan 1, 2024 Dec 31, 2024 Heptachlor epoxide MR No Yes — 0.0002 mg/L — Archived Dec 31, 2024 Synthetic Organic Chemicals
Jan 1, 2024 Dec 31, 2024 Picloram MR No Yes — 0.5 mg/L — Archived Dec 31, 2024 Synthetic Organic Chemicals
Jan 1, 2024 Dec 31, 2024 BHC-GAMMA MR No Yes — 0.0002 mg/L — Archived Dec 31, 2024 Synthetic Organic Chemicals
Jan 1, 2024 Dec 31, 2024 Nitrate-Nitrite MR No Yes — — — Resolved Dec 31, 2024 Nitrate Rule
Jan 1, 2024 Dec 31, 2024 Toxaphene MR No Yes — 0.003 mg/L — Archived Dec 31, 2024 Synthetic Organic Chemicals
Jan 1, 2024 Dec 31, 2024 Endothall MR No Yes — 0.1 mg/L — Archived Dec 31, 2024 Synthetic Organic Chemicals
Jan 1, 2024 Dec 31, 2024 Toxaphene MR No Yes — 0.003 mg/L — Archived Dec 31, 2024 Synthetic Organic Chemicals
Jan 1, 2024 Dec 31, 2024 2,4-D MR No Yes — 0.07 mg/L — Archived Dec 31, 2024 Synthetic Organic Chemicals
Jan 1, 2024 Dec 31, 2024 Simazine MR No Yes — 0.004 mg/L — Archived Dec 31, 2024 Synthetic Organic Chemicals
Jan 1, 2024 Dec 31, 2024 Endothall MR No Yes — 0.1 mg/L — Archived Dec 31, 2024 Synthetic Organic Chemicals
Jan 1, 2024 Dec 31, 2024 Endothall MR No Yes — 0.1 mg/L — Archived Dec 31, 2024 Synthetic Organic Chemicals
Jan 1, 2024 Dec 31, 2024 Picloram MR No Yes — 0.5 mg/L — Archived Dec 31, 2024 Synthetic Organic Chemicals
Jan 1, 2024 Dec 31, 2024 Picloram MR No Yes — 0.5 mg/L — Archived Dec 31, 2024 Synthetic Organic Chemicals
Jan 1, 2024 Dec 31, 2024 LASSO MR No Yes — — — Archived Dec 31, 2024 Synthetic Organic Chemicals
Jan 1, 2024 Dec 31, 2024 LASSO MR No Yes — — — Archived Dec 31, 2024 Synthetic Organic Chemicals
Jan 1, 2024 Dec 31, 2024 Heptachlor MR No Yes — 0.0004 mg/L — Archived Dec 31, 2024 Synthetic Organic Chemicals
Jan 1, 2024 Dec 31, 2024 Heptachlor MR No Yes — 0.0004 mg/L — Archived Dec 31, 2024 Synthetic Organic Chemicals
Jan 1, 2024 Dec 31, 2024 Simazine MR No Yes — 0.004 mg/L — Archived Dec 31, 2024 Synthetic Organic Chemicals
Jan 1, 2024 Dec 31, 2024 Carbofuran MR No Yes — 0.04 mg/L — Archived Dec 31, 2024 Synthetic Organic Chemicals
Jan 1, 2024 Dec 31, 2024 Di(2-ethylhexyl) phthalate MR No Yes — 0.006 mg/L — Archived Dec 31, 2024 Synthetic Organic Chemicals
Jan 1, 2024 Dec 31, 2024 Toxaphene MR No Yes — 0.003 mg/L — Archived Dec 31, 2024 Synthetic Organic Chemicals
Jan 1, 2024 Dec 31, 2024 2,4-D MR No Yes — 0.07 mg/L — Archived Dec 31, 2024 Synthetic Organic Chemicals
Jan 1, 2024 Dec 31, 2024 Heptachlor epoxide MR No Yes — 0.0002 mg/L — Archived Dec 31, 2024 Synthetic Organic Chemicals
Jan 1, 2024 Dec 31, 2024 Endrin MR No Yes — 0.002 mg/L — Archived Dec 31, 2024 Synthetic Organic Chemicals
Jan 1, 2024 Dec 31, 2024 Dalapon MR No Yes — 0.2 mg/L — Archived Dec 31, 2024 Synthetic Organic Chemicals
Jan 1, 2024 Dec 31, 2024 Dalapon MR No Yes — 0.2 mg/L — Archived Dec 31, 2024 Synthetic Organic Chemicals
Jan 1, 2024 Dec 31, 2024 Heptachlor epoxide MR No Yes — 0.0002 mg/L — Archived Dec 31, 2024 Synthetic Organic Chemicals
Jan 1, 2024 Dec 31, 2024 LASSO MR No Yes — — — Archived Dec 31, 2024 Synthetic Organic Chemicals
Jan 1, 2024 Dec 31, 2024 HEXACHLOROBENZENE MR No Yes — 0.001 mg/L — Archived Dec 31, 2024 Synthetic Organic Chemicals
Jan 1, 2024 Dec 31, 2024 BHC-GAMMA MR No Yes — 0.0002 mg/L — Archived Dec 31, 2024 Synthetic Organic Chemicals
Jan 1, 2024 Dec 31, 2024 Carbofuran MR No Yes — 0.04 mg/L — Archived Dec 31, 2024 Synthetic Organic Chemicals
Jan 1, 2024 Dec 31, 2024 Glyphosate MR No Yes — 0.7 mg/L — Archived Dec 31, 2024 Synthetic Organic Chemicals
Jan 1, 2024 Dec 31, 2024 2,4-D MR No Yes — 0.07 mg/L — Archived Dec 31, 2024 Synthetic Organic Chemicals
Jan 1, 2024 Dec 31, 2024 Glyphosate MR No Yes — 0.7 mg/L — Archived Dec 31, 2024 Synthetic Organic Chemicals
Jan 1, 2024 Dec 31, 2024 Endrin MR No Yes — 0.002 mg/L — Archived Dec 31, 2024 Synthetic Organic Chemicals
Jan 1, 2024 Dec 31, 2024 Di(2-ethylhexyl) phthalate MR No Yes — 0.006 mg/L — Archived Dec 31, 2024 Synthetic Organic Chemicals
Jan 1, 2024 Dec 31, 2024 Glyphosate MR No Yes — 0.7 mg/L — Archived Dec 31, 2024 Synthetic Organic Chemicals
Jan 1, 2024 Dec 31, 2024 BHC-GAMMA MR No Yes — 0.0002 mg/L — Archived Dec 31, 2024 Synthetic Organic Chemicals
Jan 1, 2024 Dec 31, 2024 HEXACHLOROBENZENE MR No Yes — 0.001 mg/L — Archived Dec 31, 2024 Synthetic Organic Chemicals
Jan 1, 2024 Dec 31, 2024 Heptachlor MR No Yes — 0.0004 mg/L — Archived Dec 31, 2024 Synthetic Organic Chemicals
Jan 1, 2024 Dec 31, 2024 Carbofuran MR No Yes — 0.04 mg/L — Archived Dec 31, 2024 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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