Warm Springs Owners Mutual Wa, CO
Lead detected, under the action levels
Latest 90th-percentile lead: 9.5 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
Warm Springs Owners Mutual Wa serves about 250 people through 175 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Park County, Colorado. EPA system ID: CO0147180. Ask the utility on your bill for your address in their service line inventory.
Every lead result on file
That is up 6.5 ppb from 3 ppb in the period ending 2021. The highest 90th-percentile result EPA holds for Warm Springs Owners Mutual Wa is 9.5 ppb across 7 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 9.5 ppb |
| 2021 | 3 ppb |
| 2020 | 4 ppb |
| 2019 | 4.5 ppb |
| 2018 | 8.5 ppb |
| 2017 | 3.5 ppb |
| 2016 | 3 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. Warm Springs Owners Mutual Wa's 9.5 ppb sits at the 98th percentile in Colorado and the 97th nationally (higher means more lead).
Nearby utilities
9 other systems share Park County; 0 of them have a higher latest lead result than Warm Springs Owners Mutual Wa. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Fairplay Town Of | 909 | 1 ppb |
| Bailey Wsd | 483 | 0 (not detected) |
| Alma Town Of | 460 | 2 ppb |
| Redhill Forest Pomwaca | 388 | 0 (not detected) |
| Will O Wisp Metro District | 300 | 5.5 ppb |
| Spruce Hill Development | 277 | 2 ppb |
| River-Dale Ranch | 83 | 0 (not detected) |
| Eleven Mile Ranch Association | 72 | 2.5 ppb |
| Shawnee Wca | 50 | 0 (not detected) |
What to do in your house
Test your own tap with a certified lab first-draw sample; Fairplay, 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 Warm Springs Owners Mutual Wa 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. What a 90th-percentile result does and does not tell you: how to read a lead result. Size matters more than most people expect: small vs large water systems.