Olga Water Users Inc, WA
Lead detected, under the action levels
Latest 90th-percentile lead: 3.1 ppb (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. 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
Olga Water Users Inc serves about 392 people through 130 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws surface water, in San Juan County, Washington. EPA system ID: WA5363400. Ask the utility on your bill for your address in their service line inventory.
Olga Water Users Inc's lead record
That is down 9.2 ppb from 12.3 ppb in the period ending 2022. The highest 90th-percentile result EPA holds for Olga Water Users Inc is 12.3 ppb across 4 monitoring periods, none of them over 15 ppb (1 over 10 ppb).
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 3.1 ppb |
| 2022 | 12.3 ppb over 10 |
| 2019 | 2 ppb |
| 2016 | 2 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. Olga Water Users Inc's 3.1 ppb sits at the 82nd percentile in Washington and the 83rd nationally (higher means more lead).
Neighbouring systems
39 other systems share San Juan County; 14 of them have a higher latest lead result than Olga Water Users Inc. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Eastsound Water Users Association | 3,711 | 5.3 ppb |
| Friday Harbor Town Of | 3,543 | 1.6 ppb |
| Roche Harbor Water System Inc | 2,091 | 3.3 ppb |
| Rosario | 1,426 | 4.5 ppb |
| Fisherman Bay Water Association | 1,195 | 0 (not detected) |
| Doe Bay Water Users Assoc | 442 | 3.3 ppb |
| West Sound Water Association | 206 | 1.6 ppb |
| Cape San Juan Water District | 164 | 5.1 ppb |
| Oaks The Mobile Home Park | 143 | 1.1 ppb |
| Mackaye Harbor Water District | 133 | 1.5 ppb |
What to do in your house
Test your own tap with a certified lab first-draw sample; Eastsound, 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 Olga Water Users Inc 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.