Overbrook Subdivision, WY
Lead detected, under the action levels
Latest 90th-percentile lead: 1 ppb (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. Lead was measured in sampled homes but the 90th percentile is under both action levels. EPA's health goal for lead is zero, so test your own tap if your home was built before 1986 or anyone in it is pregnant or a young child.
Who runs the water here
Overbrook Subdivision serves about 66 people through 22 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Campbell County, Wyoming. EPA system ID: WY5601572; phone on file: 307-299-3544. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Overbrook Subdivision's lead record
Against the period ending 2023 (2 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Overbrook Subdivision is 4 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 1 ppb |
| 2023 | 2 ppb |
| 2020 | 3 ppb |
| 2017 | 4 ppb |
Against other Wyoming systems
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. Overbrook Subdivision's 1 ppb sits at the 35th percentile in Wyoming and the 51st nationally (higher means more lead).
Nearby utilities
44 other systems share Campbell County; 18 of them have a higher latest lead result than Overbrook Subdivision. 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 |
| Antelope Valley I&S District (Avisd) | 1,280 | 0 (not detected) |
| 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 |
What to do in your house
Test your own tap with a certified lab first-draw sample; Gillette, WY may offer free or low-cost kits through the utility. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Overbrook Subdivision 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. Size matters more than most people expect: small vs large water systems.