Clark Rural Water-Kampeska, SD
Lead detected, under the action levels
Latest 90th-percentile lead: 4 ppb (monitoring period 2025-2025). 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.
About Clark Rural Water-Kampeska
Clark Rural Water-Kampeska serves about 602 people through 252 service connections, which makes it a small system under EPA's size classes. It is privately owned and draws groundwater, in Codington,Day County, South Dakota. EPA system ID: SD4602277; phone on file: 6055325201. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Clark Rural Water-Kampeska's lead record
Against the period ending 2024 (3 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Clark Rural Water-Kampeska is 7 ppb across 6 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 4 ppb |
| 2024 | 3 ppb |
| 2024 | 6 ppb |
| 2022 | 5 ppb |
| 2019 | 4 ppb |
| 2016 | 7 ppb |
Where this result ranks
Of the 458 South Dakota systems with a lead result, the median latest reading is 2 ppb; 0 are over 15 ppb right now and 6 have gone over at some point. Clark Rural Water-Kampeska's 4 ppb sits at the 85th percentile in South Dakota and the 87th nationally (higher means more lead).
What to do in your house
Test your own tap with a certified lab first-draw sample; Clark, SD 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 Clark Rural Water-Kampeska whether it covers that cost before hiring anyone - many utilities now do. Its latest copper 90th percentile is 1400 ppb (copper action level 1,300 ppb).
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.