Chehalis Water Department, WA
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2021-2023). 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.
Who runs the water here
Chehalis Water Department serves about 11,718 people through 4,382 service connections, which makes it a large system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws surface water, in Lewis County, Washington. EPA system ID: WA5312250. Ask the utility on your bill for your address in their service line inventory.
Chehalis Water Department's lead record
Against the period ending 2020 (1 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Chehalis Water Department is 1 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2023 | 0 (not detected) |
| 2020 | 1 ppb |
| 2017 | 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. Chehalis Water Department's reported as 0 (not detected) sits at the 34th percentile in Washington and the 37th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Nearby utilities
50 other systems share Lewis County; 36 of them have a higher latest lead result than Chehalis Water Department. 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) |
| 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 |
| Mossyrock Public Utility City Of | 1,553 | 2 ppb |
| High Valley Country Club | 1,425 | 2 ppb |
| Lewis Co Water Dist #1 | 1,174 | 1.7 ppb |
Next steps for Chehalis, WA
Look up your address in Chehalis Water Department'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 Chehalis Water Department 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. The lead result guide covers how utilities pick the homes they sample. A zero today does not rule out a jump later - the rules are tightening in 2027.