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Public water system record

Annunciation Heights

On record as serving Larimer County, CO · Serves 260 people

Federal records show 5 health-based violations and 11 monitoring/reporting issues for Annunciation Heights in the last ten years. The most serious issue in this window was a resolved Total Trihalomethanes (TTHMs) violation.

  • CO0235185
  • ESTES PARK
  • CO
  • 260 served

System profile

Source water Groundwater
ZIP 80517
EPA system ID CO0235185

Verify this system on EPA ECHO →

Health-based violations, last 10 years
5
Resolved
5
Unresolved
0
Any acute record
No
Monitoring issues, last 10 years
11

Key facts

  • Annunciation Heights draws water from 2 wells (1 of them for emergency, seasonal or other part-time use).
  • Highest measured level in the last 10 years: Total Trihalomethanes (TTHMs), 0.108 mg/L, federal limit 0.08 mg/L (1.4 times the limit), 2024.
  • Record on file since 1996, with 15 health-based violations before October 19, 2016.
  • Lead pipe inventory: 0 lead and 0 unknown out of 24 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 0.108 mg/L, federal limit 0.08 mg/L (1.4 times the limit)
 220 Apr 1, 2024 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.105 mg/L, federal limit 0.08 mg/L (1.3 times the limit)
 220 Jan 1, 2024 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.0987 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
 220 Oct 1, 2023 Resolved No
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.1 mg/L, federal limit 0.08 mg/L (1.3 times the limit)
 220 Jul 1, 2023 Resolved No
Lead and Copper Rule
Treatment technique failure
 350 Jan 1, 2018 Resolved No

Monitoring and reporting issues

Since October 2016

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

Issue Start date Status
Haloacetic Acids (HAA5)
Monitoring and reporting
 Oct 1, 2025 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
Total Trihalomethanes (TTHMs)
Monitoring and reporting
 Oct 1, 2025 Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
Lead and Copper Rule
Monitoring and reporting
 Jan 1, 2021 Resolved
Public Notice
OTHER
 Mar 31, 2020 Resolved
Public Notice
OTHER
 Mar 7, 2020 Resolved
Lead and Copper Rule
Monitoring and reporting
 Jan 1, 2020 Resolved
Public Notice
OTHER
 Oct 1, 2019 Resolved
Lead and Copper Rule
Monitoring and reporting
 Jul 1, 2019 Resolved
Public Notice
OTHER
 Jul 1, 2019 Resolved
Lead and Copper Rule
Monitoring and reporting
 Jan 1, 2019 Resolved
Lead and Copper Rule
Monitoring and reporting
 Jan 1, 2018 Resolved

Full record since 1996

EPA's records for Annunciation Heights go back to 1996. Before October 19, 2016 they list 15 health-based violations (15 resolved) and 3 monitoring or reporting violations.

Violations that began in Health-based Monitoring and reporting
1990s 0 1
2010 to October 18, 2016 15 2
October 19, 2016 to 2019 1 5
2020s 4 6

Most recent health-based violation before October 19, 2016: Gross Alpha, Excl. Radon and U, began January 2016, Resolved.

Show all 15 health-based violations before October 19, 2016
Contaminant Start date Status
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 33 pCi/L, federal limit 15 pCi/L (2.2 times the limit)
 Jan 1, 2016 Resolved
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 6.6 pCi/L, federal limit 5 pCi/L (1.3 times the limit)
 Oct 1, 2015 Resolved
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 56.05 pCi/L, federal limit 15 pCi/L (3.7 times the limit)
 Oct 1, 2015 Resolved
Combined Uranium
Contaminant limit exceeded
Measured 52 µg/L, federal limit 30 µg/L (1.7 times the limit)
 Jul 1, 2015 Resolved
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 8 pCi/L, federal limit 5 pCi/L (1.6 times the limit)
 Jul 1, 2015 Resolved
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 80 pCi/L, federal limit 15 pCi/L (5.3 times the limit)
 Jul 1, 2015 Resolved
Combined Uranium
Contaminant limit exceeded
Measured 55 µg/L, federal limit 30 µg/L (1.8 times the limit)
 Apr 1, 2015 Resolved
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 79 pCi/L, federal limit 15 pCi/L (5.3 times the limit)
 Apr 1, 2015 Resolved
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 8 pCi/L, federal limit 5 pCi/L (1.6 times the limit)
 Apr 1, 2015 Resolved
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 7 pCi/L, federal limit 5 pCi/L (1.4 times the limit)
 Jan 1, 2015 Resolved
Combined Uranium
Contaminant limit exceeded
Measured 51 µg/L, federal limit 30 µg/L (1.7 times the limit)
 Jan 1, 2015 Resolved
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 63 pCi/L, federal limit 15 pCi/L (4.2 times the limit)
 Jan 1, 2015 Resolved
Combined Uranium
Contaminant limit exceeded
Measured 48 µg/L, federal limit 30 µg/L (1.6 times the limit)
 Oct 1, 2014 Resolved
Combined Radium (-226 and -228)
Contaminant limit exceeded
Measured 6 pCi/L, federal limit 5 pCi/L (1.2 times the limit)
 Oct 1, 2014 Resolved
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
Measured 51 pCi/L, federal limit 15 pCi/L (3.4 times the limit)
 Oct 1, 2014 Resolved

What the violations mean

Total Trihalomethanes (TTHMs)

4 incidents

Disinfection byproduct levels exceeded the federal limit

Long-term TTHM exposure may increase bladder cancer risk

Lead and Copper Rule

1 incident

The system did not complete a treatment step or action that the Lead and Copper Rule requires (a treatment technique violation).

The utility had to notify customers about this violation.

Where the water comes from

Annunciation Heights draws water from 2 wells (1 of them for emergency, seasonal or other part-time use).

Annual water quality report

Annunciation Heights 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 Annunciation Heights 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