Watertown Municipal Utilities, SD
Lead detected, under the action levels
Latest 90th-percentile lead: 2 ppb (monitoring period 2024-2024). 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 Watertown Municipal Utilities
Watertown Municipal Utilities serves about 23,230 people through 9,968 service connections, which makes it a large system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in Codington County, South Dakota. EPA system ID: SD4600356; phone on file: 6058826233. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Watertown Municipal Utilities's lead record
Against the period ending 2021 (2 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Watertown Municipal Utilities is 2 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 2 ppb |
| 2021 | 2 ppb |
| 2018 | 1 ppb |
How Watertown Municipal Utilities compares
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. Watertown Municipal Utilities's 2 ppb sits at the 72nd percentile in South Dakota and the 73rd nationally (higher means more lead).
Neighbouring systems
4 other systems share Codington County; 0 of them have a higher latest lead result than Watertown Municipal Utilities. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Florence | 337 | 1 ppb |
| Henry | 256 | 1 ppb |
| South Shore | 189 | 1 ppb |
| Wallace | 91 | 0 (not detected) |
Next steps for Watertown, SD
Test your own tap with a certified lab first-draw sample; Watertown, 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 Watertown Municipal Utilities 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. Systems that went over once often dip back under; here is what that means.