Cs Hydro Resources-Tusayan, MO
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.
Who runs the water here
Cs Hydro Resources-Tusayan serves about 1,710 people through 117 service connections, which makes it a small system under EPA's size classes. It is privately owned and draws groundwater, in Coconino County, Missouri. EPA system ID: AZ0403312; phone on file: 602-698-9786. 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 Cs Hydro Resources-Tusayan is 12.1 ppb across 5 monitoring periods, none of them over 15 ppb (1 over 10 ppb).
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0 (not detected) |
| 2022 | 0 (not detected) |
| 2019 | 2.28 ppb |
| 2018 | 12.1 ppb over 10 |
| 2016 | 3.3 ppb |
Where this result ranks
Of the 1,674 Missouri systems with a lead result, the median latest reading is 1.04 ppb; 2 are over 15 ppb right now and 74 have gone over at some point. Cs Hydro Resources-Tusayan's reported as 0 (not detected) sits at the 32nd percentile in Missouri and the 30th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Other water systems in Coconino County
3 other systems share Coconino County; 1 of them has a higher latest lead result than Cs Hydro Resources-Tusayan. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Cs Mormon Lake Water Company | 353 | 13 ppb |
| Cs Flagstaff Ranch Water Company | 350 | 0 (not detected) |
| Cs West Village Water Company | 210 | 0 (not detected) |
What to do in your house
Look up your address in Cs Hydro Resources-Tusayan'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 Cs Hydro Resources-Tusayan 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. Small systems behave differently: why small systems go over more often.