Cypress Black Bayou Water System, LA
Lead detected, under the action levels
Latest 90th-percentile lead: 1.2 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.
Who runs the water here
Cypress Black Bayou Water System serves about 5,520 people through 1,840 service connections, which makes it a medium-sized system under EPA's size classes. It is privately owned and draws surface water, in Bossier Parish County, Louisiana. EPA system ID: LA1015040; phone on file: 318-965-0015. They can tell you what your service line is made of and whether they pay to replace it.
Cypress Black Bayou Water System's lead record
That is up 1.2 ppb from 0 ppb in the period ending 2022. The highest 90th-percentile result EPA holds for Cypress Black Bayou Water System is 3 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 1.2 ppb |
| 2022 | 0 (not detected) |
| 2019 | 2 ppb |
| 2016 | 3 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. Cypress Black Bayou Water System's 1.2 ppb sits at the 69th percentile in Louisiana and the 59th nationally (higher means more lead).
Neighbouring systems
18 other systems share Bossier Parish County; 2 of them have a higher latest lead result than Cypress Black Bayou Water System. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| City Of Bossier City Water System | 79,506 | 1 ppb |
| Village Water System | 24,813 | 0 (not detected) |
| Barksdale Afb Water System | 13,000 | 0 (not detected) |
| Town Of Benton Water System | 8,037 | 0 (not detected) |
| Town Of Haughton Water System | 5,355 | 0 (not detected) |
| Sligo Water System Incorporated | 2,850 | 0 (not detected) |
| Town Of Plain Dealing Water System | 2,346 | 1 ppb |
| West Central Bossier Water System | 1,771 | 0 (not detected) |
| South Bossier Water System | 1,755 | 0 (not detected) |
| Bellevue Water System | 1,236 | 0 (not detected) |
Next steps for Benton, LA
Test your own tap with a certified lab first-draw sample; Benton, 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 Cypress Black Bayou 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. The lead result guide covers how utilities pick the homes they sample. Size matters more than most people expect: small vs large water systems.