Sandy Lake Water Supply, LA
Exceeded the action level in the past
Latest 90th-percentile lead: 2 ppb (monitoring period 2026-2026). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. The latest result is under the action level, but this system has gone over 15 ppb before. Lead comes from pipes, not the source water, so a home with a lead service line can still be exposed. Test your own tap.
About Sandy Lake Water Supply
Sandy Lake Water Supply serves about 3,141 people through 1,047 service connections, which makes it a small system under EPA's size classes. It is privately owned and draws groundwater, in Catahoula Parish County, Louisiana. EPA system ID: LA1025008; phone on file: 318-339-7380. They can tell you what your service line is made of and whether they pay to replace it.
Lead results over time
That is down 16 ppb from 18 ppb in the period ending 2025. The highest 90th-percentile result EPA holds for Sandy Lake Water Supply is 18 ppb across 5 monitoring periods, 1 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 2 ppb |
| 2025 | 18 ppb over 15 |
| 2022 | 14 ppb over 10 |
| 2019 | 15 ppb over 10 |
| 2016 | 5 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. Sandy Lake Water Supply's 2 ppb sits at the 79th percentile in Louisiana and the 72nd nationally (higher means more lead).
Nearby utilities
6 other systems share Catahoula Parish County; 2 of them have a higher latest lead result than Sandy Lake Water Supply. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Town Of Jonesville Water System | 2,811 | 8 ppb |
| Black River Water System | 2,256 | 0 (not detected) |
| Village Of Harrisonburg Water System | 1,530 | 2.7 ppb |
| Leland Water System Inc | 1,140 | 0 (not detected) |
| Village Of Sicily Island | 930 | 2 ppb |
| Maitland Water Works District | 900 | 1.1 ppb |
What to do in your house
Test your own tap with a certified lab first-draw sample; Jonesville, 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 Sandy Lake 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. The lead result guide covers how utilities pick the homes they sample. Why an old exceedance still matters: over the limit before, under it now.