Buttermilk Md, CO
Lead detected, under the action levels
Latest 90th-percentile lead: 0.3 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.
About Buttermilk Md
Buttermilk Md serves about 200 people through 64 service connections, which makes it a very small system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws surface water, in Pitkin County, Colorado. EPA system ID: CO0149160; phone on file: 970-273-3100. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Lead results over time
Against the period ending 2021 (0.5 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Buttermilk Md is 12 ppb across 7 monitoring periods, none of them over 15 ppb (1 over 10 ppb).
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0.3 ppb |
| 2021 | 0.5 ppb |
| 2020 | 0.8 ppb |
| 2019 | 0.8 ppb |
| 2018 | 10 ppb |
| 2017 | 0.5 ppb |
| 2016 | 12 ppb over 10 |
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. Buttermilk Md's 0.3 ppb sits at the 38th percentile in Colorado and the 41st nationally (higher means more lead).
Neighbouring systems
25 other systems share Pitkin County; 17 of them have a higher latest lead result than Buttermilk Md. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Aspen City Of | 31,100 | 1 ppb |
| Snowmass Village Wsd | 6,353 | 0 (not detected) |
| Brush Creek Wd | 516 | 1.1 ppb |
| Wj Metro District | 324 | 0 (not detected) |
| Lazy Glen Hoa | 322 | 0 (not detected) |
| Aspen Village Md | 300 | 3 ppb |
| Starwood Metropolitan District | 300 | 0.5 ppb |
| Holland Hills Md | 225 | 1 ppb |
| Woody Creek Metropolitan District | 220 | 0.5 ppb |
| Redstone Wsd | 180 | 0.8 ppb |
Your move
Test your own tap with a certified lab first-draw sample; Basalt, 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 Buttermilk Md 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. Systems that went over once often dip back under; here is what that means.