Middle Fork Water & Sewer, WA
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (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. 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.
Middle Fork Water & Sewer at a glance
Middle Fork Water & Sewer serves about 144 people through 66 service connections, which makes it a very 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: WA5300315. Ask the utility on your bill for your address in their service line inventory.
Every lead result on file
That is down 2 ppb from 2 ppb in the period ending 2022. The highest 90th-percentile result EPA holds for Middle Fork Water & Sewer is 4 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0 (not detected) |
| 2022 | 2 ppb |
| 2019 | 4 ppb |
| 2016 | 1 ppb |
How Middle Fork Water & Sewer 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. Middle Fork Water & Sewer's reported as 0 (not detected) sits at the 18th percentile in Washington and the 12th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Other water systems in Lewis County
50 other systems share Lewis County; 36 of them have a higher latest lead result than Middle Fork Water & Sewer. 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 |
| Mossyrock Public Utility City Of | 1,553 | 2 ppb |
| High Valley Country Club | 1,425 | 2 ppb |
Next steps for Chehalis, WA
Look up your address in Middle Fork Water & Sewer'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 Middle Fork Water & Sewer 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. Small systems behave differently: why small systems go over more often.