Westminster City Of, CO
Lead detected, under the action levels
Latest 90th-percentile lead: 1.3 ppb (monitoring period 2023-2025). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. Lead was measured in sampled homes but the 90th percentile is under both action levels. EPA's health goal for lead is zero, so test your own tap if your home was built before 1986 or anyone in it is pregnant or a young child.
Who runs the water here
Westminster City Of serves about 202,078 people through 33,619 service connections, which makes it a very large system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws surface water, in Adams County, Colorado. EPA system ID: CO0101170; phone on file: 303-658-2374. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Every lead result on file
Against the period ending 2021 (2 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Westminster City Of is 3 ppb across 7 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 1.3 ppb |
| 2021 | 2 ppb |
| 2020 | 2.6 ppb |
| 2019 | 2.6 ppb |
| 2018 | 3 ppb |
| 2017 | 1 ppb |
| 2016 | 2 ppb |
Where this result ranks
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. Westminster City Of's 1.3 ppb sits at the 60th percentile in Colorado and the 61st nationally (higher means more lead).
Nearby utilities
62 other systems share Adams County; 16 of them have a higher latest lead result than Westminster City Of. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Thornton City Of | 226,465 | 2.3 ppb |
| South Adams County Wsd | 75,559 | 0 (not detected) |
| Brighton City Of | 56,304 | 2 ppb |
| Northglenn City Of | 48,927 | 1.7 ppb |
| Crestview Wsd | 23,756 | - |
| North Washington Street Wsd | 14,500 | - |
| Federal Heights City Of | 11,678 | 1.7 ppb |
| Todd Creek Village Md | 7,363 | 0.8 ppb |
| Bennett Town Of | 4,400 | 1 ppb |
| Wikiup Mhp | 2,500 | 0 (not detected) |
Next steps for Westminster, CO
Test your own tap with a certified lab first-draw sample; Westminster, 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 Westminster City Of 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. Why sampled homes are the worst-case ones is in the guide to reading the number. The action level is dropping - the 10 ppb rule from 2027.