Harrisville W/A, MS
Lead detected, under the action levels
Latest 90th-percentile lead: 1.6 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.
Who runs the water here
Harrisville W/A serves about 1,967 people through 744 service connections, which makes it a small system under EPA's size classes. It is under mixed public and private ownership and draws groundwater, in Simpson County, Mississippi. EPA system ID: MS0640004; phone on file: 601-847-7800. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Harrisville W/A's lead record
That is down 4.7 ppb from 6.3 ppb in the period ending 2017. The highest 90th-percentile result EPA holds for Harrisville W/A is 6.3 ppb across 2 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2023 | 1.6 ppb |
| 2017 | 6.3 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. Harrisville W/A's 1.6 ppb sits at the 70th percentile in Mississippi and the 65th nationally (higher means more lead).
Other water systems in Simpson County
14 other systems share Simpson County; 5 of them have a higher latest lead result than Harrisville W/A. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Okatoma Water Association #2 | 5,866 | 0.7 ppb |
| Smiths Crossing Water Assn | 4,480 | 10.3 ppb |
| Okatoma Water Association #1 | 3,981 | 3 ppb |
| City Of Magee | 3,526 | 12 ppb |
| New Hope Water Association | 2,587 | 0.5 ppb |
| Highway 28 Water Association | 2,500 | 0 (not detected) |
| City Of Mendenhall | 2,500 | 0 (not detected) |
| Shivers Water Association | 2,200 | 1.7 ppb |
| Boggan Ridge W/A | 1,500 | 0.6 ppb |
| Poplar Springs Water District | 1,188 | 0.6 ppb |
Next steps for Harrisville, MS
Test your own tap with a certified lab first-draw sample; Harrisville, 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 Harrisville W/A 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.