San Acacio Domestic Wa, CO
Lead detected, under the action levels
Latest 90th-percentile lead: 0.5 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.
San Acacio Domestic Wa at a glance
San Acacio Domestic Wa serves about 40 people through 27 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Costilla County, Colorado. EPA system ID: CO0112850; phone on file: 719-672-0314. Call that number and ask whether your address has a lead, galvanized or unknown service line.
San Acacio Domestic Wa's lead record
Against the period ending 2021 (0.5 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for San Acacio Domestic Wa is 3.5 ppb across 6 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0.5 ppb |
| 2021 | 0.5 ppb |
| 2020 | 0 (not detected) |
| 2019 | 3.5 ppb |
| 2018 | 0 (not detected) |
| 2016 | 1 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. San Acacio Domestic Wa's 0.5 ppb sits at the 39th percentile in Colorado and the 43rd nationally (higher means more lead).
Neighbouring systems
7 other systems share Costilla County; 1 of them has a higher latest lead result than San Acacio Domestic Wa. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| San Luis Wsd | 629 | 0 (not detected) |
| Costilla County Ws | 561 | 0 (not detected) |
| Ft Garland Wsd | 477 | 0 (not detected) |
| Blanca Town Of | 469 | 0 (not detected) |
| Garcia Domestic Wua | 100 | 0 (not detected) |
| Viejo San Acacio | 45 | 0 (not detected) |
| Lake Sanchez Estates | 34 | 1 ppb |
What to do in your house
Test your own tap with a certified lab first-draw sample; San Luis, 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 San Acacio Domestic 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. The lead result guide covers how utilities pick the homes they sample. Size matters more than most people expect: small vs large water systems.