Prvwsd-Twin Harbor, MS
Lead detected, under the action levels
Latest 90th-percentile lead: 0.8 ppb (monitoring period 2022-2024). 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.
Who runs the water here
Prvwsd-Twin Harbor serves about 2,973 people through 1,126 service connections, which makes it a small system under EPA's size classes. It is owned by the state and draws groundwater, in Madison County, Mississippi. EPA system ID: MS0450024; phone on file: 601-856-6574. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Lead results over time
Against the period ending 2021 (1.8 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Prvwsd-Twin Harbor is 1.8 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 0.8 ppb |
| 2021 | 1.8 ppb |
| 2018 | 0 (not detected) |
Where this result ranks
Of the 973 Mississippi systems with a lead result, the median latest reading is 1 ppb; 9 are over 15 ppb right now and 44 have gone over at some point. Prvwsd-Twin Harbor's 0.8 ppb sits at the 41st percentile in Mississippi and the 48th nationally (higher means more lead).
Nearby utilities
15 other systems share Madison County; 12 of them have a higher latest lead result than Prvwsd-Twin Harbor. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Bear Creek W/A-West | 26,677 | 1.6 ppb |
| City Of Ridgeland | 24,340 | 1.3 ppb |
| Bear Creek W/A -East | 18,770 | 3.2 ppb |
| City Of Canton | 16,785 | 1.7 ppb |
| City Of Madison | 16,136 | 1.1 ppb |
| Cmu - Lake Caroline | 8,511 | 1.2 ppb |
| East Madison Water Assn-West | 7,339 | 1.6 ppb |
| Town Of Flora #1 | 1,653 | 0.6 ppb |
| Prvwsd-Main Harbor | 1,497 | 1.3 ppb |
| West Madison Utl Dist | 1,287 | 1.04 ppb |
Your move
Test your own tap with a certified lab first-draw sample; Ridgeland, MS 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 Prvwsd-Twin Harbor 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. Size matters more than most people expect: small vs large water systems.