Black River Water System, LA
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2022-2024). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. The latest 90th-percentile result was reported as 0 (not detected at the lab's limit). That says the sampled homes were low, not that your home has no lead service line. Check your utility's service line inventory for your address.
Black River Water System at a glance
Black River Water System serves about 2,256 people through 752 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: LA1025002; phone on file: 318-481-3933. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Lead results over time
That is down 9 ppb from 9 ppb in the period ending 2021. The highest 90th-percentile result EPA holds for Black River Water System is 9 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 0 (not detected) |
| 2021 | 9 ppb |
| 2018 | 2 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. Black River Water System's reported as 0 (not detected) sits at the 28th percentile in Louisiana and the 31st nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Nearby utilities
6 other systems share Catahoula Parish County; 5 of them have a higher latest lead result than Black River Water System. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Sandy Lake Water Supply | 3,141 | 2 ppb |
| Town Of Jonesville Water System | 2,811 | 8 ppb |
| 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
Look up your address in Black River Water System's service line inventory. If it says lead, galvanized or unknown, test your tap. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Black River Water System 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. Small systems behave differently: why small systems go over more often.