Claremont, SD
Exceeded the action level in the past
Latest 90th-percentile lead: 6 ppb (monitoring period 2023-2023). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. The latest result is under the action level, but this system has gone over 15 ppb before. Lead comes from pipes, not the source water, so a home with a lead service line can still be exposed. Test your own tap.
About Claremont
Claremont serves about 108 people through 61 service connections, which makes it a very small system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in Brown County, South Dakota. EPA system ID: SD4600090; phone on file: 6054485417. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Lead results over time
Against the period ending 2020 (5 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Claremont is 16 ppb across 5 monitoring periods, 1 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2023 | 6 ppb |
| 2020 | 5 ppb |
| 2018 | 1 ppb |
| 2018 | 1 ppb |
| 2017 | 16 ppb over 15 |
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. Claremont's 6 ppb sits at the 92nd percentile in South Dakota and the 93rd nationally (higher means more lead).
Nearby utilities
19 other systems share Brown County; 0 of them have a higher latest lead result than Claremont. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Aberdeen | 27,989 | 3 ppb |
| Groton | 1,380 | 3 ppb |
| Warner | 485 | 1 ppb |
| Lakeside Estates | 460 | 1 ppb |
| Country Village Park | 340 | 1 ppb |
| Prairiewood Property Owners | 300 | 1 ppb |
| Frederick | 215 | 2 ppb |
| Hecla | 200 | 2 ppb |
| Jobee Acres | 108 | 2 ppb |
| Long Lake Colony | 107 | 0 (not detected) |
What to do in your house
Test your own tap with a certified lab first-draw sample; Britton, 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 Claremont 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. What a 90th-percentile result does and does not tell you: how to read a lead result. Why an old exceedance still matters: over the limit before, under it now.