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CALHAN TOWN OF

Colorado — Community Water System — PWSID: CO0121075

System Information

PWSIDCO0121075
System NameCALHAN TOWN OF
System TypeCommunity Water System
Water SourceGround Water
Activity StatusActive
Owner TypeLocal
EPA Region08
Serves SchoolNo
WholesalerNo
First ReportedMar 20, 1979
Last ReportedNov 17, 2025

Location & Contact

StateColorado
CityCALHAN
ZIP Code80808
Address—
OrganizationTOMPKINS, CINDY
Phone719-347-2586

Population & Service

Population Served780
Service Connections397

Drinking Water Violations (64)

This water system has 64 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 2, 2025 — LEAD AND COPPER RULE REVISIONS RPT No No — — — Resolved Jul 3, 2025 Lead and Copper Rule Revisions
Jul 2, 2025 — LEAD AND COPPER RULE REVISIONS RPT No No — — — Resolved Jul 3, 2025 Lead and Copper Rule Revisions
Jul 2, 2025 — LEAD AND COPPER RULE REVISIONS RPT No No — — — Resolved Jul 3, 2025 Lead and Copper Rule Revisions
Apr 1, 2025 — Lead and Copper Rule MR No No — TT — Resolved Apr 1, 2025 Lead and Copper Rule
Apr 1, 2025 — Lead and Copper Rule MR No No — TT — Resolved Apr 1, 2025 Lead and Copper Rule
Apr 1, 2025 — Lead and Copper Rule MR No No — TT — Resolved Apr 1, 2025 Lead and Copper Rule
Jul 1, 2023 Sep 30, 2023 Di(2-ethylhexyl) phthalate MR No Yes — 0.006 mg/L — Resolved Sep 30, 2023 Synthetic Organic Chemicals
Jul 1, 2023 Sep 30, 2023 Di(2-ethylhexyl) phthalate MR No Yes — 0.006 mg/L — Resolved Sep 30, 2023 Synthetic Organic Chemicals
Jul 1, 2023 Sep 30, 2023 Di(2-ethylhexyl) phthalate MR No Yes — 0.006 mg/L — Resolved Sep 30, 2023 Synthetic Organic Chemicals
Jan 1, 2023 Dec 31, 2023 TTHM MR No Yes — 0.080 mg/L — Resolved Dec 31, 2023 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2023 Dec 31, 2023 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Dec 31, 2023 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2023 Dec 31, 2023 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Dec 31, 2023 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2023 Dec 31, 2023 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Dec 31, 2023 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2023 Dec 31, 2023 TTHM MR No Yes — 0.080 mg/L — Resolved Dec 31, 2023 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2023 Dec 31, 2023 TTHM MR No Yes — 0.080 mg/L — Resolved Dec 31, 2023 Stage 2 Disinfectants and Disinfection Byproducts Rule
Mar 12, 2022 — Public Notice Other No No — — — Resolved Mar 31, 2022 Public Notice Rule and Revised PN Rule
Mar 12, 2022 — Public Notice Other No No — — — Resolved Mar 31, 2022 Public Notice Rule and Revised PN Rule
Apr 1, 2021 — Stage 1 Disinfectants and Disinfection Byproducts Rule TT Yes No — — — Resolved Apr 9, 2021 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2021 — Stage 1 Disinfectants and Disinfection Byproducts Rule TT Yes No — — — Resolved Apr 9, 2021 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2021 — Stage 1 Disinfectants and Disinfection Byproducts Rule TT Yes No — — — Resolved Apr 9, 2021 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2021 — Stage 1 Disinfectants and Disinfection Byproducts Rule TT Yes No — — — Resolved Apr 9, 2021 Stage 1 Disinfectants and Disinfection Byproducts Rule
Nov 11, 2018 — Public Notice Other No No — — — Resolved Feb 28, 2019 Public Notice Rule and Revised PN Rule
Nov 11, 2018 — Public Notice Other No No — — — Resolved Feb 28, 2019 Public Notice Rule and Revised PN Rule
Oct 11, 2018 — Revised Total Coliform Rule Other No No — — — Resolved Nov 15, 2018 Revised Total Coliform Rule
Oct 11, 2018 — Revised Total Coliform Rule Other No No — — — Resolved Nov 15, 2018 Revised Total Coliform Rule
Oct 11, 2018 — Revised Total Coliform Rule Other No No — — — Resolved Nov 15, 2018 Revised Total Coliform Rule
Oct 11, 2018 — Revised Total Coliform Rule Other No No — — — Resolved Nov 15, 2018 Revised Total Coliform Rule
Oct 1, 2011 — Lead and Copper Rule MR No No — TT — Resolved Aug 28, 2012 Lead and Copper Rule
Oct 1, 2011 — Lead and Copper Rule MR No No — TT — Resolved Aug 28, 2012 Lead and Copper Rule
Oct 1, 2011 — Lead and Copper Rule MR No No — TT — Resolved Aug 28, 2012 Lead and Copper Rule
Oct 1, 2011 — Lead and Copper Rule MR No No — TT — Resolved Aug 28, 2012 Lead and Copper Rule
Jul 1, 2011 Sep 30, 2011 2,4-D MR No Yes — 0.07 mg/L — Resolved Sep 30, 2011 Synthetic Organic Chemicals
Jul 1, 2011 Sep 30, 2011 2,4-D MR No Yes — 0.07 mg/L — Resolved Sep 30, 2011 Synthetic Organic Chemicals
Jul 1, 2011 Sep 30, 2011 2,4-D MR No Yes — 0.07 mg/L — Resolved Sep 30, 2011 Synthetic Organic Chemicals
Jul 1, 2011 Sep 30, 2011 2,4-D MR No Yes — 0.07 mg/L — Resolved Sep 30, 2011 Synthetic Organic Chemicals
Jul 1, 2011 Sep 30, 2011 Pentachlorophenol MR No Yes — 0.001 mg/L — Resolved Sep 30, 2011 Synthetic Organic Chemicals
Jul 1, 2011 Sep 30, 2011 Pentachlorophenol MR No Yes — 0.001 mg/L — Resolved Sep 30, 2011 Synthetic Organic Chemicals
Jul 1, 2011 Sep 30, 2011 Pentachlorophenol MR No Yes — 0.001 mg/L — Resolved Sep 30, 2011 Synthetic Organic Chemicals
Jul 1, 2011 Sep 30, 2011 Pentachlorophenol MR No Yes — 0.001 mg/L — Resolved Sep 30, 2011 Synthetic Organic Chemicals
Jul 1, 2011 Sep 30, 2011 Dalapon MR No Yes — 0.2 mg/L — Resolved Sep 30, 2011 Synthetic Organic Chemicals
Jul 1, 2011 Sep 30, 2011 Dalapon MR No Yes — 0.2 mg/L — Resolved Sep 30, 2011 Synthetic Organic Chemicals
Jul 1, 2011 Sep 30, 2011 Dalapon MR No Yes — 0.2 mg/L — Resolved Sep 30, 2011 Synthetic Organic Chemicals
Jul 1, 2011 Sep 30, 2011 Dalapon MR No Yes — 0.2 mg/L — Resolved Sep 30, 2011 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 Atrazine MR No Yes — 0.003 mg/L — Resolved Dec 31, 2013 Synthetic Organic Chemicals
Jan 1, 2011 Dec 31, 2013 Atrazine MR No Yes — 0.003 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 LASSO MR No Yes — — — 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 Atrazine MR No Yes — 0.003 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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