Town Of Port Gibson, MS
Lead detected, under the action levels
Latest 90th-percentile lead: 4.3 ppb (monitoring period 2025-2025). 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.
Town Of Port Gibson at a glance
Town Of Port Gibson serves about 3,047 people through 1,154 service connections, which makes it a small system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in Claiborne County, Mississippi. EPA system ID: MS0110005; phone on file: 601-437-4234. They can tell you what your service line is made of and whether they pay to replace it.
Lead results over time
Against the period ending 2024 (3.7 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Town Of Port Gibson is 6.7 ppb across 19 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 4.3 ppb |
| 2024 | 3.7 ppb |
| 2023 | 3.4 ppb |
| 2022 | 2.4 ppb |
| 2021 | 2.9 ppb |
| 2021 | 3.7 ppb |
| 2020 | 0 (not detected) |
| 2020 | 0 (not detected) |
| 2020 | 4.2 ppb |
| 2020 | 4.2 ppb |
| 2019 | 4.2 ppb |
| 2019 | 4.2 ppb |
| 2019 | 6.7 ppb |
| 2019 | 6.7 ppb |
| 2018 | 3.2 ppb |
| 2018 | 3.2 ppb |
| 2018 | 5.2 ppb |
| 2018 | 5.2 ppb |
| 2016 | 1.2 ppb |
How Town Of Port Gibson compares
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. Town Of Port Gibson's 4.3 ppb sits at the 94th percentile in Mississippi and the 89th nationally (higher means more lead).
Other water systems in Claiborne County
5 other systems share Claiborne County; 1 of them has a higher latest lead result than Town Of Port Gibson. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Alcorn State University | 3,000 | 0.7 ppb |
| Pattison W/A-West | 2,933 | 3.5 ppb |
| Hermanville Water Association | 1,442 | 1.28 ppb |
| C S & I Water Assn #1 | 1,014 | 4.2 ppb |
| Romola Water Association | 600 | 68.6 ppb |
What to do in your house
Test your own tap with a certified lab first-draw sample; Port Gibson, 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 Town Of Port Gibson 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. Systems that went over once often dip back under; here is what that means.