Edgemont, SD
Lead detected, under the action levels
Latest 90th-percentile lead: 3 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. 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
Edgemont serves about 725 people through 506 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 groundwater, in Fall River County, South Dakota. EPA system ID: SD4600114. Ask the utility on your bill for your address in their service line inventory.
Every lead result on file
That is down 2 ppb from 5 ppb in the period ending 2020. The highest 90th-percentile result EPA holds for Edgemont is 5 ppb across 5 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2023 | 3 ppb |
| 2020 | 5 ppb |
| 2018 | 4 ppb |
| 2018 | 3 ppb |
| 2017 | 4 ppb |
Against other South Dakota systems
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. Edgemont's 3 ppb sits at the 77th percentile in South Dakota and the 82nd nationally (higher means more lead).
Other water systems in Fall River County
8 other systems share Fall River County; 1 of them has a higher latest lead result than Edgemont. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Hot Springs | 3,395 | 3 ppb |
| Fall River Wud | 1,057 | 1 ppb |
| Hot Springs Va Center | 445 | 4 ppb |
| Oelrichs | 117 | 2 ppb |
| Country Club Estates | 83 | 1 ppb |
| Liberty Hills Community | 68 | 2 ppb |
| Green Acres Water Corporation | 31 | 2 ppb |
| Provo Area Water System | 25 | 1 ppb |
Next steps for Edgemont, SD
Test your own tap with a certified lab first-draw sample; Edgemont, 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 Edgemont 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. Size matters more than most people expect: small vs large water systems.