Lake Cushman System 3, 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.
About Lake Cushman System 3
Lake Cushman System 3 serves about 917 people through 401 service connections, which makes it a small system under EPA's size classes. It is privately owned and draws groundwater, in Mason County, Washington. EPA system ID: WA5303528. 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 Lake Cushman System 3 is 3 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0 (not detected) |
| 2022 | 2 ppb |
| 2019 | 2 ppb |
| 2016 | 3 ppb |
Where this result ranks
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. Lake Cushman System 3's reported as 0 (not detected) sits at the 30th percentile in Washington and the 26th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Neighbouring systems
119 other systems share Mason County; 68 of them have a higher latest lead result than Lake Cushman System 3. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Shelton City Of | 15,273 | 1.8 ppb |
| Belfair Water District 1 | 4,432 | 0 (not detected) |
| Lake Cushman System 5 | 3,675 | 2 ppb |
| Timberlake Community Club Inc | 2,337 | 5 ppb |
| Washington Corrections Center | 2,223 | 1.6 ppb |
| Alderbrook Water Co | 2,154 | 0 (not detected) |
| Lake Limerick Water | 2,148 | 0 (not detected) |
| Lakeland Village Water | 2,120 | 0 (not detected) |
| Hoodsport | 1,853 | 2 ppb |
| Shorecrest Estates Water Co | 1,321 | 1 ppb |
What to do in your house
Look up your address in Lake Cushman System 3'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 Lake Cushman System 3 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.