Deaver Municipal Water System, WY
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.
Deaver Municipal Water System at a glance
Deaver Municipal Water System serves about 176 people through 123 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 Big Horn County, Wyoming. EPA system ID: WY5600016; phone on file: 307-664-2736. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Every lead result on file
Against the period ending 2022 (1 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Deaver Municipal Water System is 1 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0 (not detected) |
| 2022 | 1 ppb |
| 2019 | 0 (not detected) |
| 2016 | 0 (not detected) |
How Deaver Municipal Water System compares
Of the 311 Wyoming systems with a lead result, the median latest reading is 1 ppb; 0 are over 15 ppb right now and 16 have gone over at some point. Deaver Municipal Water System's reported as 0 (not detected) sits at the 15th percentile in Wyoming and the 14th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Neighbouring systems
14 other systems share Big Horn County; 11 of them have a higher latest lead result than Deaver Municipal Water System. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Lovell, Town Of | 2,250 | 0 (not detected) |
| Greybull, Town Of | 2,080 | 1 ppb |
| Basin, Town Of | 1,250 | 3 ppb |
| South Big Horn County Jpb | 900 | 1 ppb |
| Cowley, Town Of | 800 | 3 ppb |
| Byron, Town Of | 561 | 0 (not detected) |
| Burlington, Town Of | 348 | 1 ppb |
| Frannie, Town Of | 160 | 1 ppb |
| South End Water Users S&I District | 150 | 0 (not detected) |
| Shell Town Water Improvement District | 120 | 5 ppb |
What to do in your house
Look up your address in Deaver Municipal Water System'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 Deaver Municipal Water System 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. A zero today does not rule out a jump later - the rules are tightening in 2027.