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LARKSPUR TOWN OF

Colorado — Community Water System — PWSID: CO0118030

System Information

PWSIDCO0118030
System NameLARKSPUR TOWN OF
System TypeCommunity Water System
Water SourceGround Water
Activity StatusActive
Owner TypeLocal
EPA Region08
Serves SchoolNo
WholesalerNo
First ReportedNov 24, 1987
Last ReportedNov 17, 2025

Location & Contact

StateColorado
CityLARKSPUR
ZIP Code80118
Address8720 SPRUCE MTN RD
OrganizationWEST, SHERILYN
Phone720-828-6211

Population & Service

Population Served275
Service Connections109

Drinking Water Violations (143)

This water system has 143 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
Feb 4, 2024 — Public Notice Other No No — — — Resolved Mar 19, 2024 Public Notice Rule and Revised PN Rule
Feb 4, 2024 — Public Notice Other No No — — — Resolved Mar 19, 2024 Public Notice Rule and Revised PN Rule
Oct 1, 2023 Dec 31, 2023 Combined Radium (-226 and -228) MCL Yes No 6.05 PCI/L 5 pCi/L 5 Resolved Dec 31, 2023 Radionuclides and Revised Rad Rule
Oct 1, 2023 Dec 31, 2023 Combined Radium (-226 and -228) MCL Yes No 6.05 PCI/L 5 pCi/L 5 Resolved Dec 31, 2023 Radionuclides and Revised Rad Rule
Oct 1, 2023 Dec 31, 2023 Combined Radium (-226 and -228) MCL Yes No 6.05 PCI/L 5 pCi/L 5 Resolved Dec 31, 2023 Radionuclides and Revised Rad Rule
Oct 1, 2023 Dec 31, 2023 Combined Radium (-226 and -228) MCL Yes No 6.05 PCI/L 5 pCi/L 5 Resolved Dec 31, 2023 Radionuclides and Revised Rad Rule
Jul 1, 2023 Sep 30, 2023 Combined Radium (-226 and -228) MCL Yes No 5.88 PCI/L 5 pCi/L 5 Resolved Sep 30, 2023 Radionuclides and Revised Rad Rule
Jul 1, 2023 Sep 30, 2023 Combined Radium (-226 and -228) MCL Yes No 5.88 PCI/L 5 pCi/L 5 Resolved Sep 30, 2023 Radionuclides and Revised Rad Rule
Jul 1, 2023 Sep 30, 2023 Combined Radium (-226 and -228) MCL Yes No 5.88 PCI/L 5 pCi/L 5 Resolved Sep 30, 2023 Radionuclides and Revised Rad Rule
Jul 1, 2023 Sep 30, 2023 Combined Radium (-226 and -228) MCL Yes No 5.88 PCI/L 5 pCi/L 5 Resolved Sep 30, 2023 Radionuclides and Revised Rad Rule
Jul 1, 2023 Sep 30, 2023 Combined Radium (-226 and -228) MCL Yes No 5.88 PCI/L 5 pCi/L 5 Resolved Sep 30, 2023 Radionuclides and Revised Rad Rule
Apr 16, 2023 — Public Notice Other No No — — — Resolved Jun 6, 2023 Public Notice Rule and Revised PN Rule
Apr 16, 2023 — Public Notice Other No No — — — Resolved Jun 6, 2023 Public Notice Rule and Revised PN Rule
Apr 16, 2023 — Public Notice Other No No — — — Resolved Jun 6, 2023 Public Notice Rule and Revised PN Rule
Apr 1, 2023 Jun 30, 2023 Combined Radium (-226 and -228) MCL Yes No 6.58 PCI/L 5 pCi/L 5 Resolved Jun 30, 2023 Radionuclides and Revised Rad Rule
Apr 1, 2023 Jun 30, 2023 Combined Radium (-226 and -228) MCL Yes No 6.58 PCI/L 5 pCi/L 5 Resolved Jun 30, 2023 Radionuclides and Revised Rad Rule
Apr 1, 2023 Jun 30, 2023 Combined Radium (-226 and -228) MCL Yes No 6.58 PCI/L 5 pCi/L 5 Resolved Jun 30, 2023 Radionuclides and Revised Rad Rule
Apr 1, 2023 Jun 30, 2023 Combined Radium (-226 and -228) MCL Yes No 6.58 PCI/L 5 pCi/L 5 Resolved Jun 30, 2023 Radionuclides and Revised Rad Rule
Apr 1, 2023 Jun 30, 2023 Combined Radium (-226 and -228) MCL Yes No 6.58 PCI/L 5 pCi/L 5 Resolved Jun 30, 2023 Radionuclides and Revised Rad Rule
Jan 1, 2023 Dec 31, 2023 CHLOROBENZENE MR No Yes — 0.1 mg/L — Resolved Nov 16, 2023 Volatile Organic Chemicals
Jan 1, 2023 Mar 31, 2023 Combined Radium (-226 and -228) MCL Yes No 6.25 PCI/L 5 pCi/L 5 Resolved Mar 31, 2023 Radionuclides and Revised Rad Rule
Jan 1, 2023 Dec 31, 2023 CHLOROBENZENE MR No Yes — 0.1 mg/L — Resolved Nov 16, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 Styrene MR No Yes — 0.1 mg/L — Resolved Nov 16, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 Styrene MR No Yes — 0.1 mg/L — Resolved Nov 16, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 Styrene MR No Yes — 0.1 mg/L — Resolved Nov 16, 2023 Volatile Organic Chemicals
Jan 1, 2023 Mar 31, 2023 Combined Radium (-226 and -228) MCL Yes No 6.25 PCI/L 5 pCi/L 5 Resolved Mar 31, 2023 Radionuclides and Revised Rad Rule
Jan 1, 2023 Mar 31, 2023 Combined Radium (-226 and -228) MCL Yes No 6.25 PCI/L 5 pCi/L 5 Resolved Mar 31, 2023 Radionuclides and Revised Rad Rule
Jan 1, 2023 Mar 31, 2023 Combined Radium (-226 and -228) MCL Yes No 6.25 PCI/L 5 pCi/L 5 Resolved Mar 31, 2023 Radionuclides and Revised Rad Rule
Jan 1, 2023 Mar 31, 2023 Combined Radium (-226 and -228) MCL Yes No 6.25 PCI/L 5 pCi/L 5 Resolved Mar 31, 2023 Radionuclides and Revised Rad Rule
Jan 1, 2023 Dec 31, 2023 o-Dichlorobenzene MR No Yes — 0.6 mg/L — Resolved Nov 16, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 o-Dichlorobenzene MR No Yes — 0.6 mg/L — Resolved Nov 16, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 o-Dichlorobenzene MR No Yes — 0.6 mg/L — Resolved Nov 16, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 p-Dichlorobenzene MR No Yes — 0.075 mg/L — Resolved Nov 16, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 p-Dichlorobenzene MR No Yes — 0.075 mg/L — Resolved Nov 16, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 p-Dichlorobenzene MR No Yes — 0.075 mg/L — Resolved Nov 16, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 trans-1,2-Dichloroethylene MR No Yes — 0.1 mg/L — Resolved Nov 16, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 trans-1,2-Dichloroethylene MR No Yes — 0.1 mg/L — Resolved Nov 16, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 trans-1,2-Dichloroethylene MR No Yes — 0.1 mg/L — Resolved Nov 16, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 cis-1,2-Dichloroethylene MR No Yes — 0.07 mg/L — Resolved Nov 16, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 cis-1,2-Dichloroethylene MR No Yes — 0.07 mg/L — Resolved Nov 16, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 DICHLOROMETHANE MR No Yes — 0.005 mg/L — Resolved Nov 16, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 Toluene MR No Yes — 1 mg/L — Resolved Nov 16, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 Vinyl chloride MR No Yes — 0.002 mg/L — Resolved Nov 16, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 Vinyl chloride MR No Yes — 0.002 mg/L — Resolved Nov 16, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 Vinyl chloride MR No Yes — 0.002 mg/L — Resolved Nov 16, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 DICHLOROMETHANE MR No Yes — 0.005 mg/L — Resolved Nov 16, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 Ethylbenzene MR No Yes — 0.7 mg/L — Resolved Nov 16, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 Ethylbenzene MR No Yes — 0.7 mg/L — Resolved Nov 16, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 Ethylbenzene MR No Yes — 0.7 mg/L — Resolved Nov 16, 2023 Volatile Organic Chemicals
Jan 1, 2023 Dec 31, 2023 Toluene MR No Yes — 1 mg/L — Resolved Nov 16, 2023 Volatile 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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