Bar Nunn, Town Of, WY
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2024-2026). 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.
About Bar Nunn, Town Of
Bar Nunn, Town Of serves about 4,000 people through 1,710 service connections, which makes it a medium-sized system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws surface water, in Natrona County, Wyoming. EPA system ID: WY5600067; phone on file: 307-237-7269. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Lead results over time
Against the period ending 2023 (1 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Bar Nunn, Town Of is 1 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 0 (not detected) |
| 2023 | 1 ppb |
| 2020 | 0 (not detected) |
| 2017 | 1 ppb |
Where this result ranks
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. Bar Nunn, Town Of's reported as 0 (not detected) sits at the 29th percentile in Wyoming and the 34th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Nearby utilities
20 other systems share Natrona County; 13 of them have a higher latest lead result than Bar Nunn, Town Of. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Casper, City Of | 59,000 | 1 ppb |
| Mills, City Of | 4,050 | 0 (not detected) |
| Evansville, Town Of | 2,873 | 2 ppb |
| Vista West Water Company | 1,600 | 2 ppb |
| Pioneer Water & Sewer District | 1,500 | 2 ppb |
| Sandy Lake Estates I&S District | 450 | 0 (not detected) |
| Natrona County Int'L Airport | 423 | 0 (not detected) |
| Midwest, Town Of | 325 | 2 ppb |
| Air Base Acres I&S District | 236 | 0 (not detected) |
| Poison Spider I&S District | 200 | 0 (not detected) |
Your move
Look up your address in Bar Nunn, Town Of'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 Bar Nunn, Town Of 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. What a 90th-percentile result does and does not tell you: how to read a lead result. A zero today does not rule out a jump later - the rules are tightening in 2027.