El Rocko Mhp, CO
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (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. The latest 90th-percentile result was reported as 0 (not detected at the lab's limit). That says the sampled homes were low, not that your home has no lead service line. Check your utility's service line inventory for your address.
El Rocko Mhp at a glance
El Rocko Mhp serves about 80 people through 34 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Garfield County, Colorado. EPA system ID: CO0123248; phone on file: 970-945-5700. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Every lead result on file
Against the period ending 2022 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for El Rocko Mhp is 1.5 ppb across 8 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0 (not detected) |
| 2022 | 0 (not detected) |
| 2021 | 0 (not detected) |
| 2020 | 0 (not detected) |
| 2019 | 0.5 ppb |
| 2018 | 1.5 ppb |
| 2017 | 1 ppb |
| 2016 | 1 ppb |
How El Rocko Mhp 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. El Rocko Mhp's reported as 0 (not detected) sits at the 5th percentile in Colorado and the 7th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Neighbouring systems
52 other systems share Garfield County; 38 of them have a higher latest lead result than El Rocko Mhp. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Rifle City Of | 9,489 | 1.4 ppb |
| Glenwood Springs City Of | 9,428 | 1 ppb |
| Carbondale Town Of | 6,700 | 1.5 ppb |
| New Castle Town Of | 5,024 | 0 (not detected) |
| Battlement Mesa Md | 4,100 | 2.8 ppb |
| Silt Town Of | 3,536 | 2 ppb |
| Roaring Fork Wsd | 1,912 | 0.7 ppb |
| Parachute Town Of | 1,320 | 2.4 ppb |
| Apple Tree Park | 1,160 | 2.8 ppb |
| Cottonwood Springs Mhp | 750 | 0.6 ppb |
What to do in your house
Look up your address in El Rocko Mhp's service line inventory. If it says lead, galvanized or unknown, test your tap. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask El Rocko Mhp 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. A zero today does not rule out a jump later - the rules are tightening in 2027.