Mad Dog Wc, CO
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2026-2026). 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.
Who runs the water here
Mad Dog Wc serves about 60 people through 32 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws surface water, in Delta County, Colorado. EPA system ID: CO0215538; phone on file: 309-644-1815. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Lead results over time
That is down 1.5 ppb from 1.5 ppb in the period ending 2025. The highest 90th-percentile result EPA holds for Mad Dog Wc is 11.5 ppb across 20 monitoring periods, none of them over 15 ppb (1 over 10 ppb).
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 0 (not detected) |
| 2025 | 1.5 ppb |
| 2025 | 3 ppb |
| 2024 | 1.5 ppb |
| 2024 | 0.5 ppb |
| 2023 | 2 ppb |
| 2023 | 4 ppb |
| 2022 | 2 ppb |
| 2022 | 5 ppb |
| 2021 | 5 ppb |
| 2020 | 1 ppb |
| 2020 | 1.5 ppb |
| 2019 | 11.5 ppb over 10 |
| 2019 | 5.1 ppb |
| 2018 | 3.3 ppb |
| 2018 | 1.2 ppb |
| 2017 | 0.7 ppb |
| 2017 | 1 ppb |
| 2016 | 2.1 ppb |
| 2016 | 2.3 ppb |
How Mad Dog Wc 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. Mad Dog Wc's reported as 0 (not detected) sits at the 3rd percentile in Colorado and the 5th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Neighbouring systems
29 other systems share Delta County; 20 of them have a higher latest lead result than Mad Dog Wc. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Delta City Of | 8,700 | - |
| Orchard City Town Of | 3,100 | 7 ppb |
| Upper Surface Creek Domestic Wua | 2,800 | 3 ppb |
| Paonia Town Of | 2,499 | 1.2 ppb |
| Cedaredge Town Of | 2,400 | 2 ppb |
| Hotchkiss Town Of | 2,050 | 0.8 ppb |
| Rogers Mesa Wc | 840 | 0 (not detected) |
| Crawford Mesa Wa | 486 | 8.4 ppb |
| Crawford Town Of | 477 | 1 ppb |
| Bone Mesa Domestic Wd | 400 | 0 (not detected) |
What to do in your house
Look up your address in Mad Dog Wc'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 Mad Dog Wc whether it covers that cost before hiring anyone - many utilities now do. Its latest copper 90th percentile is 1470 ppb (copper action level 1,300 ppb).
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. A zero today does not rule out a jump later - the rules are tightening in 2027.