Mossyrock Public Utility City Of, WA
Lead detected, under the action levels
Latest 90th-percentile lead: 2 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 Mossyrock Public Utility City Of
Mossyrock Public Utility City Of serves about 1,553 people through 532 service connections, which makes it a small system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in Lewis County, Washington. EPA system ID: WA5356350. Ask the utility on your bill for your address in their service line inventory.
Lead results over time
Against the period ending 2022 (3 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Mossyrock Public Utility City Of is 3 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 2 ppb |
| 2022 | 3 ppb |
| 2019 | 2.9 ppb |
| 2016 | 2 ppb |
How Mossyrock Public Utility City Of compares
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. Mossyrock Public Utility City Of's 2 ppb sits at the 69th percentile in Washington and the 72nd nationally (higher means more lead).
Other water systems in Lewis County
50 other systems share Lewis County; 20 of them have a higher latest lead result than Mossyrock Public Utility City Of. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Centralia Public Works - Water | 28,164 | 0 (not detected) |
| Chehalis Water Department | 11,718 | 0 (not detected) |
| Winlock City Of | 3,502 | 2.4 ppb |
| Napavine City Of | 3,095 | 3 ppb |
| Boistfort Valley | 2,389 | 0 (not detected) |
| Morton City Of | 2,147 | 2.4 ppb |
| Lewis Co Water Dist #2 | 1,983 | 0 (not detected) |
| Toledo Municipal | 1,944 | 4 ppb |
| High Valley Country Club | 1,425 | 2 ppb |
| Lewis Co Water Dist #1 | 1,174 | 1.7 ppb |
Next steps for Mossyrock, WA
Test your own tap with a certified lab first-draw sample; Mossyrock, 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 Mossyrock Public Utility City 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. Why sampled homes are the worst-case ones is in the guide to reading the number. Systems that went over once often dip back under; here is what that means.