Arcadia Estates, WA
Lead detected, under the action levels
Latest 90th-percentile lead: 2.5 ppb (monitoring period 2024-2025). 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.
Who runs the water here
Arcadia Estates serves about 110 people through 44 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 Mason County, Washington. EPA system ID: WA5302857. Ask the utility on your bill for your address in their service line inventory.
Every lead result on file
Against the period ending 2023 (2.5 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Arcadia Estates is 4 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 2.5 ppb |
| 2023 | 2.5 ppb |
| 2020 | 4 ppb |
| 2017 | 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. Arcadia Estates's 2.5 ppb sits at the 76th percentile in Washington and the 77th nationally (higher means more lead).
Nearby utilities
119 other systems share Mason County; 26 of them have a higher latest lead result than Arcadia Estates. 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 |
Your move
Test your own tap with a certified lab first-draw sample; Union, 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 Arcadia Estates 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. Size matters more than most people expect: small vs large water systems.