Joyce Water Supply, LA
Lead detected, under the action levels
Latest 90th-percentile lead: 0.73 ppb (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. 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.
Joyce Water Supply at a glance
Joyce Water Supply serves about 474 people through 158 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Winn Parish County, Louisiana. EPA system ID: LA1127008; phone on file: 985-705-4696. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Every lead result on file
Against the period ending 2022 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Joyce Water Supply is 2 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0.73 ppb |
| 2022 | 0 (not detected) |
| 2019 | 0 (not detected) |
| 2016 | 2 ppb |
Where this result ranks
Of the 802 Louisiana systems with a lead result, the median latest reading is 0.72 ppb; 4 are over 15 ppb right now and 30 have gone over at some point. Joyce Water Supply's 0.73 ppb sits at the 50th percentile in Louisiana and the 47th nationally (higher means more lead).
Neighbouring systems
11 other systems share Winn Parish County; 9 of them have a higher latest lead result than Joyce Water Supply. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| City Of Winnfield Water System | 7,194 | 1 ppb |
| West Winn Water System, Inc | 1,965 | 4.6 ppb |
| Tannehill Water System | 1,932 | 3 ppb |
| Village Of Atlanta Water Supply | 900 | 6 ppb |
| Pleasant Hills-Crossroads Water Systems | 840 | 1.4 ppb |
| Backwood Village Water System | 783 | 1 ppb |
| Village Of Dodson Water System | 714 | 1 ppb |
| Hudson Gaars Mill Water System | 660 | 1 ppb |
| Village Of Sikes Water System | 639 | 0 (not detected) |
| Village Of Calvin Water System | 591 | 6 ppb |
Next steps for Mandeville, LA
Test your own tap with a certified lab first-draw sample; Mandeville, LA 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 Joyce Water Supply 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.