Antelope Valley I&S District (Avisd), 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 Antelope Valley I&S District (Avisd)
Antelope Valley I&S District (Avisd) serves about 1,280 people through 313 service connections, which makes it a small system under EPA's size classes. It is privately owned and draws groundwater, in Campbell County, Wyoming. EPA system ID: WY5600251; phone on file: 307-299-3544. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Every lead result on file
That is down 2 ppb from 2 ppb in the period ending 2023. The highest 90th-percentile result EPA holds for Antelope Valley I&S District (Avisd) is 2 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 0 (not detected) |
| 2023 | 2 ppb |
| 2020 | 2 ppb |
| 2017 | 2 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. Antelope Valley I&S District (Avisd)'s reported as 0 (not detected) sits at the 27th percentile in Wyoming and the 28th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Nearby utilities
44 other systems share Campbell County; 35 of them have a higher latest lead result than Antelope Valley I&S District (Avisd). If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Gillette, City Of | 32,222 | 2 ppb |
| Wright Water & Sewer District | 3,207 | 3 ppb |
| Sleepy Hollow Subdivision | 2,400 | 1 ppb |
| Fox Park Subdivision | 843 | 2 ppb |
| Heritage Village Subdivision | 750 | 2 ppb |
| Foothills Mobile Home Park | 735 | 1 ppb |
| Eastview Manufactured Home Community | 688 | 0 (not detected) |
| Crestview Estates Subdivision | 500 | 0 (not detected) |
| Westview Mhc | 416 | 1 ppb |
| Means Improvement & Service District | 410 | 3 ppb |
Next steps for Gillette, WY
Look up your address in Antelope Valley I&S District (Avisd)'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 Antelope Valley I&S District (Avisd) 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. Small systems behave differently: why small systems go over more often.