Tahja Ii, WA
Lead detected, under the action levels
Latest 90th-percentile lead: 2.8 ppb (monitoring period 2022-2024). 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 Tahja Ii
Tahja Ii serves about 51 people through 25 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Mason County, Washington. EPA system ID: WA5303052. Ask the utility on your bill for your address in their service line inventory.
Every lead result on file
That is down 6.8 ppb from 9.6 ppb in the period ending 2019. The highest 90th-percentile result EPA holds for Tahja Ii is 9.6 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 2.8 ppb |
| 2019 | 9.6 ppb |
| 2018 | 7.8 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. Tahja Ii's 2.8 ppb sits at the 78th percentile in Washington and the 79th nationally (higher means more lead).
Other water systems in Mason County
119 other systems share Mason County; 24 of them have a higher latest lead result than Tahja Ii. 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; Port Orchard, 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 Tahja Ii 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.