Hydrohistorian
Annunciation Heights
Modelled boundary. EPA estimated this service area (Random Forest) rather than tracing a utility-supplied map; treat the edge as approximate. About 0 km².
Where the water comes from
| Facility | Kind | Water |
|---|---|---|
| WELL NO 1 | Well | Groundwater |
| WELL NO 4 MIKES WELL | Well | Groundwater |
These are EPA's facility records, not DWR structures. Which decreed rights sit behind an intake is the next phase; nothing here is inferred.
DWR structures that name this system
Source Probable join · fetched 2026-09-09 · matched on DWR's recorded contact or an EPA intake name; verify on the dossier
No DWR structure on file records this system as its contact, and none of its EPA intakes matches a structure name in its districts. DWR records a contact on only a fraction of structures, and only for districts fetched from its live service, so this is absence of a record, not evidence of no rights.
Compliance record
Source Register of another agency · fetched 2026-09-09 · verify at EPA ECHO ↗
Nothing open today, but 20 health-based violations appear on the federal record historically. The history is below.
EPA's own summary: violations in 6 of the last 12 quarters, significant non-compliance in 2. In violation for, in EPA's words: 2456=Total Haloacetic Acids (HAA5); 2950=TTHM; 5000=Lead and Copper Rule. Currently: 5000=Lead and Copper Rule.
What happened
All 20 violation records on file, grouped into the 5 distinct things EPA's codes describe. Dates are the compliance period the violation is filed against.
Rule: Stage 2 Disinfectants and Disinfection Byproducts Rule.
Rule: Lead and Copper Rule -- corrosion of household plumbing.
Rule: Radionuclides -- radium, uranium and gross alpha.
Rule: Radionuclides -- radium, uranium and gross alpha.
Rule: Radionuclides -- radium, uranium and gross alpha.
Every violation record, as filed (12 of 20)
| Compliance period | What | About | Kind | Status | Measured |
|---|---|---|---|---|---|
| 2024-04-01 – 2024-06-30 | MCL, Average | TTHM | health-based | returned to compliance (2024-08-19) | 0.108 MG/L (limit 0.08) |
| 2024-01-01 – 2024-03-31 | MCL, Average | TTHM | health-based | returned to compliance (2024-08-19) | 0.105 MG/L (limit 0.08) |
| 2023-10-01 – 2023-12-31 | MCL, Average | TTHM | health-based | returned to compliance (2024-08-19) | 0.0987 MG/L (limit 0.08) |
| 2023-07-01 – 2023-09-30 | MCL, Average | TTHM | health-based | returned to compliance (2024-08-19) | 0.1 MG/L (limit 0.08) |
| 2018-01-01 | OCCT/SOWT Treatment Installation/Demonstration | Lead and Copper Rule | health-based | returned to compliance (2020-04-27) | |
| 2016-01-01 – 2016-03-31 | MCL, Average | Gross Alpha, Excl. Radon and U | health-based | returned to compliance (2016-09-01) | 33.0 PCI/L (limit 15.0) |
| 2015-10-01 – 2015-12-31 | MCL, Average | Combined Radium (-226 and -228) | health-based | returned to compliance (2016-09-01) | 6.6 PCI/L (limit 5.0) |
| 2015-10-01 – 2015-12-31 | MCL, Average | Gross Alpha, Excl. Radon and U | health-based | returned to compliance (2016-09-01) | 56.05 PCI/L (limit 15.0) |
| 2015-07-01 – 2015-09-30 | MCL, Average | Combined Uranium | health-based | returned to compliance (2016-09-01) | 52.0 UG/L (limit 30.0) |
| 2015-07-01 – 2015-09-30 | MCL, Average | Combined Radium (-226 and -228) | health-based | returned to compliance (2016-09-01) | 8.0 PCI/L (limit 5.0) |
| 2015-07-01 – 2015-09-30 | MCL, Average | Gross Alpha, Excl. Radon and U | health-based | returned to compliance (2016-09-01) | 80.0 PCI/L (limit 15.0) |
| 2015-04-01 – 2015-06-30 | MCL, Average | Combined Uranium | health-based | returned to compliance (2016-09-01) | 55.0 UG/L (limit 30.0) |
The remaining 8 are on the ECHO report.
What the regulator did about it
63 enforcement actions on this system's federal record. In Colorado the state is the primacy agency, so most actions are the state's; EPA acts directly on tribal systems and when it steps in.
| Date | Action | By |
|---|---|---|
| 2026-05-07 | St Compliance achieved | state |
| 2026-05-07 | St Public Notif received | state |
| 2026-04-17 | St Violation/Reminder Notice | state |
| 2026-04-17 | St Public Notif requested | state |
| 2026-03-03 | St Compliance achieved system monitored and reported DBPs for 1Q2026 during scheduled month Feb on 03/03/2026 - znk 05/12/2026 |
state |
| 2026-01-23 | St Violation/Reminder Notice | state |
| 2026-01-23 | St Public Notif requested | state |
| 2024-08-19 | St Compliance achieved System sampled TTHM in 3Q2024 without any additional M&R or MCL vios, sample reported 08/19/2024, SOX eligible - znk 11/06/2024 |
state |
| 2024-07-03 | St Public Notif received | state |
| 2024-06-11 | St Violation/Reminder Notice | state |
| 2024-06-11 | St Public Notif requested | state |
| 2024-03-31 | St Public Notif received | state |
| 2024-03-05 | St Violation/Reminder Notice | state |
| 2024-03-05 | St Public Notif requested | state |
| 2023-12-27 | St Public Notif received | state |
| 2023-11-28 | St Violation/Reminder Notice | state |
| 2023-11-28 | St Public Notif requested | state |
| 2023-10-06 | St Public Notif received PN and COD received on 10/6/2023. MM 10/9/2023 |
state |
| 2023-09-13 | St Violation/Reminder Notice | state |
| 2023-09-13 | St Public Notif requested | state |
20 most recent of 63; the rest are on the ECHO report.
Lead and copper
The latest 90th-percentile lead result is 0.015 mg/L (sampling period ending 2025-12-31) against an action level of 0.015 mg/L, below it. 20 results on file, 2 lead results over the action level all time.
The action level is not a health limit: it is the level at which the rule requires a system to act (corrosion control, public education, and in some cases replacing lead service lines). Lead mostly enters water from household plumbing, so a system-wide percentile does not tell you what comes out of one tap.
Violation, enforcement and lead/copper records are EPA SDWIS federal reporting, fetched monthly; the summary is EPA ECHO. Code names come from EPA's own REF_CODE_VALUE table. SDWIS carries violations, not routine sample results — nitrate, disinfection by-product and PFAS values are not in it, and a clean record here means nothing was reported as a violation, not that nothing was ever detected. For what was measured, ask the system for its Consumer Confidence Report.
PFAS and lithium: EPA's UCMR 5 monitoring, 2023–2025
Source Register of another agency · fetched 2026-09-09 · verify at EPA UCMR occurrence data ↗
EPA did not sample this system under UCMR 5 (the rule covered every system serving more than 3,300 people and a drawn sample of smaller ones).
Common questions
Who provides drinking water in Estes Park, Colorado?
Annunciation Heights is the public water system serving 260 people in Larimer County, from groundwater. Its EPA public water system id is CO0235185.
Where does Annunciation Heights get its water?
Annunciation Heights reports groundwater as its primary source. EPA lists its source facilities as WELL NO 1, WELL NO 4 MIKES WELL.
Does Annunciation Heights have any drinking water violations?
EPA's compliance record shows no open health-based violations for Annunciation Heights at the last monthly fetch. Older and non-health-based entries, if any, are listed on this page.
Every provider in Larimer County.
The record
EPA SDWIS federal reporting as of 2026-09-08; the compliance record above is EPA's own, fetched monthly, and the ECHO report carries the rest. Report a problem →