Catawba Indian Nation Cws (Sc4650063), SC
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2023-2025). 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.
Who runs the water here
Catawba Indian Nation Cws (Sc4650063) serves about 446 people through 186 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 surface water, in York County, South Carolina. EPA system ID: SC4650063. 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 2 ppb in the period ending 2022. The highest 90th-percentile result EPA holds for Catawba Indian Nation Cws (Sc4650063) is 2 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0 (not detected) |
| 2022 | 2 ppb |
| 2019 | 0 (not detected) |
Where this result ranks
Of the 553 South Carolina systems with a lead result, the median latest reading is 0.73 ppb; 3 are over 15 ppb right now and 47 have gone over at some point. Catawba Indian Nation Cws (Sc4650063)'s reported as 0 (not detected) sits at the 20th percentile in South Carolina and the 21st nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Nearby utilities
61 other systems share York County; 26 of them have a higher latest lead result than Catawba Indian Nation Cws (Sc4650063). If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Rock Hill City Of (Sc4610002) | 89,850 | 2 ppb |
| York County East Wd (Sc4620002) | 30,225 | 3 ppb |
| Fort Mill Town Of (Sc4610003) | 25,000 | 0 (not detected) |
| York County West Wd (Sc4620003) | 18,273 | 0 (not detected) |
| York City Of (Sc4610001) | 11,137 | 0 (not detected) |
| Tega Cay City Of (Sc4610008) | 10,500 | 0 (not detected) |
| Clover Town Of | 8,400 | 0 (not detected) |
| Riverview Rural Cws (Sc4620001) | 2,200 | 0 (not detected) |
| Hickory Grove Town Of (Sc4610004) | 654 | 2 ppb |
| Bgwc Foxwood (Sc4650008) | 575 | 0 (not detected) |
Next steps for Rock Hill, SC
Look up your address in Catawba Indian Nation Cws (Sc4650063)'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 Catawba Indian Nation Cws (Sc4650063) 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. Why sampled homes are the worst-case ones is in the guide to reading the number. A zero today does not rule out a jump later - the rules are tightening in 2027.