Timberland Park, SD
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (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. The latest 90th-percentile result was reported as 0 (not detected at the lab's limit). That says the sampled homes were low, not that your home has no lead service line. Check your utility's service line inventory for your address.
About Timberland Park
Timberland Park serves about 95 people through 45 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws surface water, in Yankton County, South Dakota. EPA system ID: SD4600412. Ask the utility on your bill for your address in their service line inventory.
Every lead result on file
Against the period ending 2021 (1 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Timberland Park is 1 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 0 (not detected) |
| 2021 | 1 ppb |
| 2018 | 1 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. Timberland Park's reported as 0 (not detected) sits at the 2nd percentile in South Dakota and the 9th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Other water systems in Yankton County
7 other systems share Yankton County; 4 of them have a higher latest lead result than Timberland Park. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Yankton | 15,411 | 0 (not detected) |
| Gayville | 392 | 1 ppb |
| Mission Hill | 190 | 1 ppb |
| East Winds Court, Inc. | 180 | 0 (not detected) |
| Volin | 161 | 6 ppb |
| Lesterville | 115 | 0 (not detected) |
| Utica | 65 | 5 ppb |
Your move
Look up your address in Timberland Park's service line inventory. If it says lead, galvanized or unknown, test your tap. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Timberland Park 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. A zero today does not rule out a jump later - the rules are tightening in 2027.