Usace Illia Residential Area, WA
Lead detected, under the action levels
Latest 90th-percentile lead: 7.4 ppb (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. 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.
About Usace Illia Residential Area
Usace Illia Residential Area serves about 46 people through 20 service connections, which makes it a very small system under EPA's size classes. It is federally owned and draws groundwater, in Garfield County, Washington. EPA system ID: WA5348704. Ask the utility on your bill for your address in their service line inventory.
Usace Illia Residential Area's lead record
Against the period ending 2022 (7 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Usace Illia Residential Area is 7.4 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 7.4 ppb |
| 2022 | 7 ppb |
| 2019 | 4.9 ppb |
| 2016 | 1 ppb |
Against other Washington systems
Of the 2,218 Washington systems with a lead result, the median latest reading is 1 ppb; 18 are over 15 ppb right now and 62 have gone over at some point. Usace Illia Residential Area's 7.4 ppb sits at the 95th percentile in Washington and the 95th nationally (higher means more lead).
Nearby utilities
2 other systems share Garfield County; 0 of them have a higher latest lead result than Usace Illia Residential Area. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Pomeroy City Of | 1,395 | 0 (not detected) |
| Hiway Trailer Court | 36 | 1.5 ppb |
Next steps for Pomeroy, WA
Test your own tap with a certified lab first-draw sample; Pomeroy, WA 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 Usace Illia Residential Area 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. Why sampled homes are the worst-case ones is in the guide to reading the number. The action level is dropping - the 10 ppb rule from 2027.