Columbus Park, WA
Above the new 10 ppb level coming in 2027
Latest 90th-percentile lead: 10.9 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. Under the current 15 ppb rule this is not an exceedance, but it is above the 10 ppb action level that takes over in Nov 2027. Test your own tap; filter if your result shows lead.
Columbus Park at a glance
Columbus Park serves about 241 people through 126 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Thurston County, Washington. EPA system ID: WA5314185. Ask the utility on your bill for your address in their service line inventory.
Columbus Park's lead record
That is up 3.1 ppb from 7.8 ppb in the period ending 2022. The highest 90th-percentile result EPA holds for Columbus Park is 10.9 ppb across 4 monitoring periods, none of them over 15 ppb (1 over 10 ppb).
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 10.9 ppb over 10 |
| 2022 | 7.8 ppb |
| 2019 | 5.4 ppb |
| 2016 | 6.1 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. Columbus Park's 10.9 ppb sits at the 98th percentile in Washington and the 98th nationally (higher means more lead).
Other water systems in Thurston County
195 other systems share Thurston County; 7 of them have a higher latest lead result than Columbus Park. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Olympia City Of | 126,966 | 3.4 ppb |
| Lacey Water Department | 105,178 | 6 ppb |
| Tumwater City Of | 51,924 | 8 ppb |
| Yelm City Of | 17,355 | 1.9 ppb |
| Tanglewilde Thompson Place 600 | 7,900 | 2.8 ppb |
| Pattison 500 | 4,643 | 3.1 ppb |
| Grand Mound | 3,764 | 0 (not detected) |
| Tenino City Of | 3,336 | 9 ppb |
| Rainier Water Department | 3,103 | 3.4 ppb |
| Meadows 690 | 3,100 | 5.9 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 Columbus Park 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. See what changes at 10 ppb in 2027.