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Public water system record

Somerset Domestic WD

Serves Somerset, Gunnison County, CO · 100 people served

Federal records show 17 health-based violations and 16 monitoring/reporting issues for Somerset Domestic WD in the last ten years. The most serious issue in this window was a resolved Total Trihalomethanes (TTHMs) violation.

  • CO0126715
  • SOMERSET
  • CO
  • 100 served

System profile

Source water Groundwater under direct influence
ZIP 81434
EPA system ID CO0126715

Verify this system on EPA ECHO →

Health-based violations, last 10 years
17
Resolved
17
Unresolved
0
Any acute record
No
Monitoring issues, last 10 years
16

Key facts

  • Somerset Domestic WD draws water from 1 well.
  • Highest measured level in the last 10 years: Total Trihalomethanes (TTHMs), 0.152 mg/L, federal limit 0.08 mg/L (1.9 times the limit), 2017.
  • Most recent formal enforcement: compliance order (no penalty) by Colorado, April 2017.
  • Record on file since 2011, with 4 health-based violations before October 20, 2016.
  • Lead pipe inventory: 0 lead and 0 unknown out of 60 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
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.084 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
 220 Oct 1, 2023 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.082 mg/L, federal limit 0.08 mg/L (at or just above the limit)
 220 Jul 1, 2023 Resolved No
Surface Water Treatment Rule
Treatment technique failure
 120 Nov 1, 2021 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.0894 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
 220 Oct 1, 2020 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.089 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
 220 Jul 1, 2020 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.10224 mg/L, federal limit 0.08 mg/L (1.3 times the limit)
 220 Apr 1, 2020 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.0931 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
 220 Jan 1, 2020 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.095 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
 220 Oct 1, 2019 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.092 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
 220 Jul 1, 2019 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.0859 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
 220 Jul 1, 2018 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.115 mg/L, federal limit 0.08 mg/L (1.4 times the limit)
 220 Apr 1, 2018 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.123 mg/L, federal limit 0.08 mg/L (1.5 times the limit)
 220 Jan 1, 2018 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.149 mg/L, federal limit 0.08 mg/L (1.9 times the limit)
 220 Oct 1, 2017 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.152 mg/L, federal limit 0.08 mg/L (1.9 times the limit)
 220 Jul 1, 2017 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.133 mg/L, federal limit 0.08 mg/L (1.7 times the limit)
 220 Apr 1, 2017 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.135 mg/L, federal limit 0.08 mg/L (1.7 times the limit)
 220 Jan 1, 2017 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.12698 mg/L, federal limit 0.08 mg/L (1.6 times the limit)
 220 Oct 1, 2016 Resolved No

Monitoring and reporting issues

Since October 2016

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

Issue Start date Status
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
 Oct 1, 2024 Resolved
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
 Sep 1, 2024 Resolved
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
 Aug 1, 2024 Resolved
Public Notice
OTHER
 Jul 28, 2024 Resolved
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
 Jul 1, 2024 Resolved
Revised Total Coliform Rule
OTHER
 Jun 27, 2024 Resolved
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
 Jun 1, 2024 Resolved
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
 May 1, 2024 Resolved
Total Trihalomethanes (TTHMs)
Monitoring and reporting
 Nov 22, 2023 Resolved
Haloacetic Acids (HAA5)
Monitoring and reporting
 Oct 1, 2021 Resolved
Lead and Copper Rule
Monitoring and reporting
 Apr 1, 2021 Resolved
Public Notice
OTHER
 May 10, 2020 Resolved
Public Notice
OTHER
 Mar 9, 2020 Resolved
Public Notice
OTHER
 Apr 16, 2018 Resolved
Total Trihalomethanes (TTHMs)
Monitoring and reporting
 Oct 16, 2017 Resolved
Public Notice
OTHER
 Jan 20, 2017 Resolved

Full record since 2011

EPA's records for Somerset Domestic WD go back to 2011. Before October 20, 2016 they list 4 health-based violations (4 resolved) and 2 monitoring or reporting violations.

Violations that began in Health-based Monitoring and reporting
2010 to October 19, 2016 4 2
October 20, 2016 to 2019 9 3
2020s 7 13

Most recent health-based violation before October 20, 2016: Total Trihalomethanes (TTHMs), began October 2016, Resolved.

Show all 4 health-based violations before October 20, 2016
Contaminant Start date Status
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.12698 mg/L, federal limit 0.08 mg/L (1.6 times the limit)
 Oct 1, 2016 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.10038 mg/L, federal limit 0.08 mg/L (1.3 times the limit)
 Jul 1, 2016 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.123 mg/L, federal limit 0.08 mg/L (1.5 times the limit)
 Apr 1, 2016 Resolved
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.093 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
 Jan 1, 2016 Resolved

Enforcement actions

Colorado regulators took 2 formal enforcement actions against Somerset Domestic WD between 2012 and 2017. The most recent was a compliance order (no penalty) in April 2017.

Date By Action Violations covered
Apr 17, 2017 Colorado Compliance order (no penalty) 19 violations (19 health-based): Total Trihalomethanes (TTHMs)
May 21, 2012 Colorado Compliance order with a penalty 1 violation: Consumer Confidence Rule

What the violations mean

Total Trihalomethanes (TTHMs)

16 incidents

Disinfection byproduct levels exceeded the federal limit

Long-term TTHM exposure may increase bladder cancer risk

Surface Water Treatment Rule

1 incident

The system did not complete a treatment step or action that the Surface Water Treatment Rule requires (a treatment technique violation).

The utility had to notify customers about this violation.

Where the water comes from

Somerset Domestic WD draws water from 1 well.

Annual water quality report

Somerset Domestic WD 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.

Systems serving 500 or fewer people may meet the rule by telling customers the report is available on request, so you may need to ask Somerset Domestic WD for a copy.

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