Prvwsd-Main Harbor, MS
Lead detected, under the action levels
Latest 90th-percentile lead: 1.3 ppb (monitoring period 2021-2023). 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.
Prvwsd-Main Harbor at a glance
Prvwsd-Main Harbor serves about 1,497 people through 567 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: MS0450019; phone on file: 601-856-6574. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Lead results over time
Against the period ending 2020 (1 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Prvwsd-Main Harbor is 1.3 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2023 | 1.3 ppb |
| 2020 | 1 ppb |
| 2017 | 0.6 ppb |
Against other Mississippi systems
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-Main Harbor's 1.3 ppb sits at the 62nd percentile in Mississippi and the 61st nationally (higher means more lead).
Other water systems in Madison County
15 other systems share Madison County; 7 of them have a higher latest lead result than Prvwsd-Main 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 |
| Prvwsd-Twin Harbor | 2,973 | 0.8 ppb |
| Town Of Flora #1 | 1,653 | 0.6 ppb |
| West Madison Utl Dist | 1,287 | 1.04 ppb |
What to do in your house
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-Main 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. What a 90th-percentile result does and does not tell you: how to read a lead result. The action level is dropping - the 10 ppb rule from 2027.