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Public water system record

Mountain WSD

Serves an area of Jefferson County, CO · 1,941 people served

Federal records show 1 health-based violation and 4 monitoring/reporting issues for Mountain WSD in the last ten years. The most serious issue in this window was a resolved Interim Enhanced Surface Water Treatment Rule violation.

  • CO0130100
  • CONIFER
  • CO
  • 1,941 served

System profile

Source water Groundwater under direct influence
ZIP 80433
EPA system ID CO0130100

Verify this system on EPA ECHO →

Health-based violations, last 10 years
1
Resolved
1
Unresolved
0
Any acute record
Yes
Monitoring issues, last 10 years
4

Key facts

  • Mountain WSD draws water from 17 wells (1 of them for emergency, seasonal or other part-time use).
  • Most recent formal enforcement: compliance order (no penalty) by Colorado, August 2005.
  • Record on file since 2004, with 11 health-based violations before October 19, 2016.
  • Lead pipe inventory: 0 lead and 0 unknown out of 391 service lines.

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Health-based violations

Since October 2016

Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.

Contaminant Rule family Start date Status Acute
Interim Enhanced Surface Water Treatment Rule
Treatment technique failure
 120 May 1, 2024 Resolved Yes

Monitoring and reporting issues

Since October 2016

Missed tests or reports, not contaminants found above a limit.

Issue Start date Status
Consumer Confidence Rule
OTHER
 Jul 1, 2025 Resolved
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
 Oct 1, 2024 Resolved
Surface Water Treatment Rule
Monitoring and reporting
 Oct 1, 2024 Resolved
Surface Water Treatment Rule
Monitoring and reporting
 Dec 1, 2020 Resolved

Full record since 2004

EPA's records for Mountain WSD go back to 2004. Before October 19, 2016 they list 11 health-based violations (11 resolved) and 49 monitoring or reporting violations.

Violations that began in Health-based Monitoring and reporting
2000s 8 47
2010 to October 18, 2016 3 2
2020s 1 4

Most recent health-based violation before October 19, 2016: Combined Uranium, began January 2011, Resolved.

Show all 11 health-based violations before October 19, 2016
Contaminant Start date Status
Combined Uranium
Contaminant limit exceeded
Measured 150 µg/L, federal limit 30 µg/L (5 times the limit)
 Jan 1, 2011 Resolved
Combined Uranium
Contaminant limit exceeded
Measured 35 µg/L, federal limit 30 µg/L (1.2 times the limit)
 Oct 1, 2010 Resolved
Combined Uranium
Contaminant limit exceeded
Measured 99 µg/L, federal limit 30 µg/L (3.3 times the limit)
 Jan 1, 2010 Resolved
Combined Uranium
Contaminant limit exceeded
Measured 240 µg/L, federal limit 30 µg/L (8 times the limit)
 Jan 1, 2009 Resolved
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 109 pCi/L, federal limit 15 pCi/L (7.3 times the limit)
 Jan 1, 2009 Resolved
Combined Uranium
Contaminant limit exceeded
Measured 240 µg/L, federal limit 30 µg/L (8 times the limit)
 Jan 1, 2008 Resolved
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 69 pCi/L, federal limit 15 pCi/L (4.6 times the limit)
 Jan 1, 2008 Resolved
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 24 pCi/L, federal limit 15 pCi/L (1.6 times the limit)
 Jan 1, 2007 Resolved
Combined Uranium
Contaminant limit exceeded
Measured 35 µg/L, federal limit 30 µg/L (1.2 times the limit)
 Jan 1, 2007 Resolved
Combined Uranium
Contaminant limit exceeded
Measured 250 µg/L, federal limit 30 µg/L (8.3 times the limit)
 Jan 1, 2004 Resolved
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 82.5 pCi/L, federal limit 15 pCi/L (5.5 times the limit)
 Jan 1, 2004 Resolved

Enforcement actions

Colorado regulators took 1 formal enforcement action against Mountain WSD in 2005. The most recent was a compliance order (no penalty) in August 2005.

Date By Action Violations covered
Aug 31, 2005 Colorado Compliance order (no penalty) 11 violations (11 health-based): Combined Uranium, Gross Alpha, Excl. Radon and U

What the violations mean

Interim Enhanced Surface Water Treatment Rule

1 incident

The system did not meet a filtration or treatment requirement for surface water

Inadequate treatment of surface water can let pathogens such as Cryptosporidium and Giardia through

Where the water comes from

Mountain WSD draws water from 17 wells (1 of them for emergency, seasonal or other part-time use).

Annual water quality report

Mountain WSD must give its customers an annual water quality report (Consumer Confidence Report) by July 1, with the levels its tests found in the previous year.

Where the state allows it, systems serving fewer than 10,000 people may publish the report in a local newspaper or news site instead of mailing it, and must provide a copy on request.

Find a posted report with EPA's Consumer Confidence Report search

Testing your own water

To test the water at your tap, or a private well this record does not cover, use a laboratory certified for drinking water by Colorado.

Certified drinking water labs by state EPA guidance for private wells