Jeff Davis Water District 4, LA
Lead detected, under the action levels
Latest 90th-percentile lead: 1.4 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.
About Jeff Davis Water District 4
Jeff Davis Water District 4 serves about 4,194 people through 1,398 service connections, which makes it a medium-sized system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in Jefferson Davis Parish County, Louisiana. EPA system ID: LA1053013. Ask the utility on your bill for your address in their service line inventory.
Lead results over time
Against the period ending 2022 (1 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Jeff Davis Water District 4 is 4 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 1.4 ppb |
| 2022 | 1 ppb |
| 2019 | 3 ppb |
| 2016 | 4 ppb |
Against other Louisiana systems
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. Jeff Davis Water District 4's 1.4 ppb sits at the 70th percentile in Louisiana and the 62nd nationally (higher means more lead).
Nearby utilities
7 other systems share Jefferson Davis Parish County; 5 of them have a higher latest lead result than Jeff Davis Water District 4. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| City Of Jennings Water System | 9,837 | 2 ppb |
| Jeff Davis Water And Sewer Commission 1 | 9,780 | 1 ppb |
| Jeff Davis Central Waterworks District | 5,709 | 4.2 ppb |
| Town Of Welsh Water System | 4,311 | 3 ppb |
| Town Of Lake Arthur Water System | 2,706 | 0 (not detected) |
| Town Of Elton Water System | 1,512 | 2 ppb |
| Village Of Fenton Water System | 226 | 17 ppb |
What to do in your house
Test your own tap with a certified lab first-draw sample; Jennings, 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 Jeff Davis Water District 4 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.