Carson, WA
Lead detected, under the action levels
Latest 90th-percentile lead: 1.5 ppb (monitoring period 2021-2023). 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
Carson serves about 3,015 people through 1,183 service connections, which makes it a small system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws surface water, in Skamania County, Washington. EPA system ID: WA5311340. Ask the utility on your bill for your address in their service line inventory.
Carson's lead record
That is down 4.2 ppb from 5.7 ppb in the period ending 2020. The highest 90th-percentile result EPA holds for Carson is 5.7 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2023 | 1.5 ppb |
| 2020 | 5.7 ppb |
| 2017 | 1.1 ppb |
How Carson compares
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. Carson's 1.5 ppb sits at the 61st percentile in Washington and the 64th nationally (higher means more lead).
Nearby utilities
12 other systems share Skamania County; 7 of them have a higher latest lead result than Carson. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Stevenson Water Dept | 4,702 | 2.1 ppb |
| North Bonneville City Of | 1,048 | 3.1 ppb |
| Underwood | 1,000 | 8.5 ppb |
| Home Valley Water District | 500 | 1.2 ppb |
| Mill A Water Co | 278 | 0 (not detected) |
| Skamania Landing Owners Assn | 132 | 28.4 ppb |
| Duggan Falls | 100 | 2.6 ppb |
| Mountain View | 72 | 0 (not detected) |
| Maple Hill Water Services | 62 | 3 ppb |
| Wind River Community | 44 | 0.9 ppb |
Your move
Test your own tap with a certified lab first-draw sample; Carson, 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 Carson 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. Systems that went over once often dip back under; here is what that means.