Annunciation Heights, CO
Exceeded the action level in the past
Latest 90th-percentile lead: 2 ppb (monitoring period 2026-2026). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. The latest result is under the action level, but this system has gone over 15 ppb before. Lead comes from pipes, not the source water, so a home with a lead service line can still be exposed. Test your own tap.
About Annunciation Heights
Annunciation Heights serves about 260 people through 20 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Larimer County, Colorado. EPA system ID: CO0235185; phone on file: 970-586-5689. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Annunciation Heights's lead record
That is down 13 ppb from 15 ppb in the period ending 2025. The highest 90th-percentile result EPA holds for Annunciation Heights is 32 ppb across 21 monitoring periods, 2 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 2 ppb |
| 2025 | 15 ppb over 10 |
| 2025 | 2 ppb |
| 2024 | 6 ppb |
| 2024 | 2 ppb |
| 2023 | 5 ppb |
| 2023 | 9 ppb |
| 2022 | 5 ppb |
| 2022 | 13 ppb over 10 |
| 2021 | 2 ppb |
| 2021 | 2 ppb |
| 2020 | 0 (not detected) |
| 2020 | 3 ppb |
| 2019 | 4 ppb |
| 2019 | 32 ppb over 15 |
| 2018 | 9 ppb |
| 2018 | 21 ppb over 15 |
| 2017 | 4 ppb |
| 2017 | 12 ppb over 10 |
| 2016 | 7.5 ppb |
| 2016 | 14.5 ppb over 10 |
How Annunciation Heights compares
Of the 1,025 Colorado systems with a lead result, the median latest reading is 1 ppb; 2 are over 15 ppb right now and 71 have gone over at some point. Annunciation Heights's 2 ppb sits at the 70th percentile in Colorado and the 71st nationally (higher means more lead).
Neighbouring systems
44 other systems share Larimer County; 16 of them have a higher latest lead result than Annunciation Heights. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Ft Collins City Of | 179,901 | 2.8 ppb |
| Loveland City Of | 91,077 | 3.3 ppb |
| Ft Collins Loveland Wd | 63,532 | 2 ppb |
| East Larimer County Wd | 27,944 | 3.9 ppb |
| Csu Main And West Housing Campus | 27,375 | 8 ppb |
| Little Thompson Wd | 25,654 | - |
| Estes Park Town Of | 16,722 | 1.4 ppb |
| Berthoud Town Of | 14,211 | 10 ppb |
| Wellington Town Of | 11,720 | 3.7 ppb |
| Northern Colorado Wa | 4,675 | 1 ppb |
Your move
Test your own tap with a certified lab first-draw sample; Estes Park, CO may offer free or low-cost kits through the utility. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Annunciation Heights whether it covers that cost before hiring anyone - many utilities now do.
These figures describe homes the utility sampled, not your tap. Only your service line record or a test of your own water answers the question for your house. The lead result guide covers how utilities pick the homes they sample. Why an old exceedance still matters: over the limit before, under it now.