East Baton Rouge Parish Water Quality: 3 Cities Ranked by the Records
East Baton Rouge Parish, Louisiana: 3 city reports built from EPA and utility records. A county has many suppliers; each city shows the system that serves it.
Highest result for each contaminant
One row per contaminant: the highest result any system in the county reported, against its limit. Open a row for the systems behind it.
LithiumDetected in 3 systems10 µg/L EPA health reference level (screening, not a legal limit) · US EPAHighest45.6 µg/L
- BATON ROUGE WATER COMPANY45.6 µg/LSample date: 2024-03-04 to 2026-05-12
- CITY OF ZACHARY WATER SYSTEM18.9 µg/LSample date: 2023-06-19 to 2023-12-11
- CITY OF BAKER WATER SYSTEM9.39 µg/LSample date: 2024-06-19 to 2024-12-02
Lead (90th percentile)Detected in 1 system of 3 tested15 µg/L federal action level · US EPAHighest1 µg/L
- BATON ROUGE WATER COMPANY1 µg/LMonitoring period: 2023–2025
- CITY OF BAKER WATER SYSTEMNot detectedMonitoring period: 2024–2026 (still open)
- CITY OF ZACHARY WATER SYSTEMNot detectedMonitoring period: 2024–2026 (still open)
Water hardnessDetected in 1 systemAesthetic, no federal health limit · USGSHighest1.5 gpg
- BATON ROUGE WATER COMPANY1.5 gpgReporting year: 2025
29 PFAS tested, none detected in any systemShow
Tested in these 3 systems: BATON ROUGE WATER COMPANY, CITY OF BAKER WATER SYSTEM, CITY OF ZACHARY WATER SYSTEM
- 11-Chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (11Cl-PF3OUdS)
- 1H, 1H, 2H, 2H-perfluorodecane sulfonic acid (8:2 FTS)
- 1H, 1H, 2H, 2H-perfluorohexane sulfonic acid (4:2 FTS)
- 1H, 1H, 2H, 2H-perfluorooctane sulfonic acid (6:2 FTS)
- 4,8-Dioxa-3H-perfluorononanoic acid (ADONA)
- 9-Chlorohexadecafluoro-3-oxanone-1-sulfonic acid (9Cl-PF3ONS)
- Hexafluoropropylene oxide dimer acid (HFPO-DA) (GenX chemicals)
- N-ethyl perfluorooctanesulfonamidoacetic acid (NEtFOSAA)
- N-methyl perfluorooctanesulfonamidoacetic acid (NMeFOSAA)
- Nonafluoro-3,6-dioxaheptanoic acid (NFDHA)
- Perfluoro (2-ethoxyethane) sulfonic acid (PFEESA)
- Perfluoro-3-methoxypropanoic acid (PFMPA)
- Perfluoro-4-methoxybutanoic acid (PFMBA)
- Perfluorobutanesulfonic acid (PFBS)
- Perfluorobutanoic acid (PFBA)
- Perfluorodecanoic acid (PFDA)
- Perfluorododecanoic acid (PFDoA)
- Perfluoroheptanesulfonic acid (PFHpS)
- Perfluoroheptanoic acid (PFHpA)
- Perfluorohexanesulfonic acid (PFHxS)
- Perfluorohexanoic acid (PFHxA)
- Perfluorononanoic acid (PFNA)
- Perfluorooctanesulfonic acid (PFOS)
- Perfluorooctanoic acid (PFOA)
- Perfluoropentanesulfonic acid (PFPeS)
- Perfluoropentanoic acid (PFPeA)
- Perfluorotetradecanoic acid (PFTA)
- Perfluorotridecanoic acid (PFTrDA)
- Perfluoroundecanoic acid (PFUnA)
Cities ranked by the records
Ranked by the Purity Score of each city's main water system, highest first. Scores belong to water systems; there is no county score. The score is computed only from contaminants measured in the published EPA record, so this ranks the record, not which city's water is safest. How the score works.
0of 3 cities above the 15 µg/L action level
Based on each system's 90th-percentile result. Lead from household plumbing isn't in this record.
Lead in Louisiana1city reports hardness · Baton Rouge, 1.5 gpg
None above 7 gpg, the USGS threshold for hard water. An aesthetic measure with no federal health limit.
Hard water explainedLargest water systems
- Baton RougeBATON ROUGE WATER COMPANY · LA1033005596,844 served
- ZacharyCITY OF ZACHARY WATER SYSTEM · LA103303031,569 served
- BakerCITY OF BAKER WATER SYSTEM · LA103300313,855 served
Frequently asked
How does East Baton Rouge Parish tap water compare across cities?
PurityMap ranks 3 cities in East Baton Rouge Parish by the Purity Score of each city's main water system, computed only from contaminants measured in the published EPA record. Scores belong to water systems, not to cities. The highest published score is Zachary's main water system: CITY OF ZACHARY WATER SYSTEM · PWSID LA1033030 · Purity Score 100 (Excellent) · Confidence: moderate · Assessed at the water-system level. The ranking compares the records, not which city's water is safest, and your own tap can differ with household plumbing.
How many East Baton Rouge Parish cities had a PFAS sample above a 2024 EPA limit?
None of the 3 East Baton Rouge Parish city reports had a PFAS sample above a 2024 EPA limit in EPA's UCMR 5 testing. PFAS were detected below the limit in 0.
Is there lead in East Baton Rouge Parish tap water?
Utilities report lead as a 90th-percentile result from home taps. 1 of 3 East Baton Rouge Parish cities reported a value above zero, and none was above the 15 µg/L federal action level. Lead usually comes from a building's own pipes and fixtures, so only a test at your tap tells you what you drink.
Does East Baton Rouge Parish have hard water?
Hardness is published in utility water-quality reports for 1 East Baton Rouge Parish city on record; the hardest is Baton Rouge at 1.5 grains per gallon. Hardness affects scale and appliances; it is not a health finding.
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