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CORTEZ CITY OF

Colorado — Community Water System — PWSID: CO0142200

System Information

PWSIDCO0142200
System NameCORTEZ CITY OF
System TypeCommunity Water System
Water SourceSurface Water
Activity StatusActive
Owner TypeLocal
EPA Region08
Serves SchoolNo
WholesalerNo
First ReportedMar 20, 1979
Last ReportedNov 17, 2025

Location & Contact

StateColorado
CityCORTEZ
ZIP Code81321
Address110 W PROGRESS CR
OrganizationSIMPSON, CASEY
Phone970-565-7320

Population & Service

Population Served8,770
Service Connections3,725

Drinking Water Violations (187)

This water system has 187 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, 2020 Jan 31, 2020 Interim Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved Jan 31, 2020 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Jan 1, 2020 Jan 31, 2020 Interim Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved Jan 31, 2020 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Jan 1, 2020 Jan 31, 2020 Interim Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved Jan 31, 2020 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Jan 1, 2020 Jan 31, 2020 Interim Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved Jan 31, 2020 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Jan 1, 2011 Dec 31, 2013 Toxaphene MR No Yes — 0.003 mg/L — Resolved Dec 31, 2013 Synthetic Organic Chemicals
Jan 1, 2011 Dec 31, 2013 Pentachlorophenol MR No Yes — 0.001 mg/L — Resolved Dec 31, 2013 Synthetic Organic Chemicals
Jan 1, 2011 Dec 31, 2013 Pentachlorophenol MR No Yes — 0.001 mg/L — Resolved Dec 31, 2013 Synthetic Organic Chemicals
Jan 1, 2011 Dec 31, 2013 Pentachlorophenol MR No Yes — 0.001 mg/L — Resolved Dec 31, 2013 Synthetic Organic Chemicals
Jan 1, 2011 Dec 31, 2013 Endrin MR No Yes — 0.002 mg/L — Resolved Dec 31, 2013 Synthetic Organic Chemicals
Jan 1, 2011 Dec 31, 2013 Endrin MR No Yes — 0.002 mg/L — Resolved Dec 31, 2013 Synthetic Organic Chemicals
Jan 1, 2011 Dec 31, 2013 Endrin MR No Yes — 0.002 mg/L — Resolved Dec 31, 2013 Synthetic Organic Chemicals
Jan 1, 2011 Dec 31, 2013 Methoxychlor MR No Yes — 0.04 mg/L — Resolved Dec 31, 2013 Synthetic Organic Chemicals
Jan 1, 2011 Dec 31, 2013 Methoxychlor MR No Yes — 0.04 mg/L — Resolved Dec 31, 2013 Synthetic Organic Chemicals
Jan 1, 2011 Dec 31, 2013 Methoxychlor MR No Yes — 0.04 mg/L — Resolved Dec 31, 2013 Synthetic Organic Chemicals
Jan 1, 2011 Dec 31, 2013 Toxaphene MR No Yes — 0.003 mg/L — Resolved Dec 31, 2013 Synthetic Organic Chemicals
Jan 1, 2011 Dec 31, 2013 Toxaphene MR No Yes — 0.003 mg/L — Resolved Dec 31, 2013 Synthetic Organic Chemicals
Jan 1, 2011 Dec 31, 2013 Di(2-ethylhexyl) phthalate MR No Yes — 0.006 mg/L — Resolved Dec 31, 2013 Synthetic Organic Chemicals
Jan 1, 2011 Dec 31, 2013 Dalapon MR No Yes — 0.2 mg/L — Resolved Dec 31, 2013 Synthetic Organic Chemicals
Jan 1, 2011 Dec 31, 2013 Dalapon MR No Yes — 0.2 mg/L — Resolved Dec 31, 2013 Synthetic Organic Chemicals
Jan 1, 2011 Dec 31, 2013 Dalapon MR No Yes — 0.2 mg/L — Resolved Dec 31, 2013 Synthetic Organic Chemicals
Jan 1, 2011 Dec 31, 2013 Endothall MR No Yes — 0.1 mg/L — Resolved Dec 31, 2013 Synthetic Organic Chemicals
Jan 1, 2011 Dec 31, 2013 Endothall MR No Yes — 0.1 mg/L — Resolved Dec 31, 2013 Synthetic Organic Chemicals
Jan 1, 2011 Dec 31, 2013 Endothall MR No Yes — 0.1 mg/L — Resolved Dec 31, 2013 Synthetic Organic Chemicals
Jan 1, 2011 Dec 31, 2013 OXAMYL MR No Yes — 0.2 mg/L — Resolved Dec 31, 2013 Synthetic Organic Chemicals
Jan 1, 2011 Dec 31, 2013 OXAMYL MR No Yes — 0.2 mg/L — Resolved Dec 31, 2013 Synthetic Organic Chemicals
Jan 1, 2011 Dec 31, 2013 OXAMYL MR No Yes — 0.2 mg/L — Resolved Dec 31, 2013 Synthetic Organic Chemicals
Jan 1, 2011 Dec 31, 2013 Di(2-ethylhexyl) phthalate MR No Yes — 0.006 mg/L — Resolved Dec 31, 2013 Synthetic Organic Chemicals
Jan 1, 2011 Dec 31, 2013 Aldicarb MR No Yes — — — Resolved Dec 31, 2013 Synthetic Organic Chemicals
Jan 1, 2011 Dec 31, 2013 2,4,5-TP MR No Yes — 0.05 mg/L — Resolved Dec 31, 2013 Synthetic Organic Chemicals
Jan 1, 2011 Dec 31, 2013 LASSO MR No Yes — — — Resolved Dec 31, 2013 Synthetic Organic Chemicals
Jan 1, 2011 Dec 31, 2013 Hexachlorocyclopentadiene MR No Yes — 0.05 mg/L — Resolved Dec 31, 2013 Synthetic Organic Chemicals
Jan 1, 2011 Dec 31, 2013 Benzo(a)pyrene MR No Yes — 0.0002 mg/L — Resolved Dec 31, 2013 Synthetic Organic Chemicals
Jan 1, 2011 Dec 31, 2013 HEXACHLOROBENZENE MR No Yes — 0.001 mg/L — Resolved Dec 31, 2013 Synthetic Organic Chemicals
Jan 1, 2011 Dec 31, 2013 Hexachlorocyclopentadiene MR No Yes — 0.05 mg/L — Resolved Dec 31, 2013 Synthetic Organic Chemicals
Jan 1, 2011 Dec 31, 2013 LASSO MR No Yes — — — Resolved Dec 31, 2013 Synthetic Organic Chemicals
Jan 1, 2011 Dec 31, 2013 Dinoseb MR No Yes — 0.007 mg/L — Resolved Dec 31, 2013 Synthetic Organic Chemicals
Jan 1, 2011 Dec 31, 2013 HEXACHLOROBENZENE MR No Yes — 0.001 mg/L — Resolved Dec 31, 2013 Synthetic Organic Chemicals
Jan 1, 2011 Dec 31, 2013 Benzo(a)pyrene MR No Yes — 0.0002 mg/L — Resolved Dec 31, 2013 Synthetic Organic Chemicals
Jan 1, 2011 Dec 31, 2013 2,4,5-TP MR No Yes — 0.05 mg/L — Resolved Dec 31, 2013 Synthetic Organic Chemicals
Jan 1, 2011 Dec 31, 2013 ETHYLENE DIBROMIDE MR No Yes — 0.00005 mg/L — Resolved Dec 31, 2013 Synthetic Organic Chemicals
Jan 1, 2011 Dec 31, 2013 Aldicarb MR No Yes — — — Resolved Dec 31, 2013 Synthetic Organic Chemicals
Jan 1, 2011 Dec 31, 2013 Heptachlor MR No Yes — 0.0004 mg/L — Resolved Dec 31, 2013 Synthetic Organic Chemicals
Jan 1, 2011 Dec 31, 2013 LASSO MR No Yes — — — Resolved Dec 31, 2013 Synthetic Organic Chemicals
Jan 1, 2011 Dec 31, 2013 Aldicarb MR No Yes — — — Resolved Dec 31, 2013 Synthetic Organic Chemicals
Jan 1, 2011 Dec 31, 2013 Di(2-ethylhexyl) phthalate MR No Yes — 0.006 mg/L — Resolved Dec 31, 2013 Synthetic Organic Chemicals
Jan 1, 2011 Dec 31, 2013 HEXACHLOROBENZENE MR No Yes — 0.001 mg/L — Resolved Dec 31, 2013 Synthetic Organic Chemicals
Jan 1, 2011 Dec 31, 2013 2,4,5-TP MR No Yes — 0.05 mg/L — Resolved Dec 31, 2013 Synthetic Organic Chemicals
Jan 1, 2011 Dec 31, 2013 Heptachlor MR No Yes — 0.0004 mg/L — Resolved Dec 31, 2013 Synthetic Organic Chemicals
Jan 1, 2011 Dec 31, 2013 Dinoseb MR No Yes — 0.007 mg/L — Resolved Dec 31, 2013 Synthetic Organic Chemicals
Jan 1, 2011 Dec 31, 2013 ETHYLENE DIBROMIDE MR No Yes — 0.00005 mg/L — Resolved Dec 31, 2013 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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