We read 16 results from New Orleans Carrollton Ww’s 2025 water quality report. 1 result over a legal limit and 8 above a health goal or guideline.
Serves about 334,903 people · Water system ID LA1071009 · Read the district’s 2025 report (opens in a new tab)
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Results from the 2025 report
Each number is copied from the district’s report and links to the page it’s printed on. Where the report lists several plants, wells or purchased water, the highest is shown.
| Contaminant | Result | Health goal | Legal limit | What it means |
|---|---|---|---|---|
| Total coliform bacteriahighest month · range ND to 5.6 · listed as a violation in the report · Distribution system · 2025 report, page 11 | 5.6 % positive | 0 % positive | 5 % positive | Over the legal limit1.1x the legal limit |
| Atrazinehighest measured · range 0.05 to 0.19 · Carrollton plant · 2025 report, page 12 | 0.19 ppb | 0.15 ppb | 3 ppb | Above the health goal1.3x the health goal |
| Gross beta (radioactivity)highest measured · range 2.86 to 3.26 · Carrollton plant · 2025 report, page 12 | 3.26 pCi/L | 0 pCi/L | 50 pCi/L | Above the health goalThe health goal is zero |
| Lead90th percentile of 85 homes tested, 2 over the action level · Customer taps · 2025 report, page 11 | 6 ppb | 0.2 ppb | 15 ppb (action level) | Above the health goal30x the health goal |
| PFOA (a PFAS)average · range ND to 2.8 · Carrollton plant · 2025 report, page 13 | 1.7 ppt | 0.007 ppt | 4 ppt from 2029 | Above the health goal243x the health goal |
| PFOS (a PFAS)average · range ND to 2.8 · Carrollton plant · 2025 report, page 13 | 1.7 ppt | 1 ppt | 4 ppt from 2029 | Above the health goal1.7x the health goal |
| Radium (combined 226 + 228)highest measured · range 0.32 to 1.62 · Carrollton plant · 2025 report, page 12 | 1.62 pCi/L | 0 pCi/L | 5 pCi/L | Above the health goalThe health goal is zero |
| Radium-226highest measured · range 0.32 to 0.73 · Carrollton plant · 2025 report, page 12 | 0.73 pCi/L | 0.05 pCi/L | 5 pCi/L | Above the health goal15x the health goal |
| Radium-228highest measured · range ND to 0.89 · Carrollton plant · 2025 report, page 12 | 0.89 pCi/L | 0.02 pCi/L | 5 pCi/L | Above the health goal47x the health goal |
| Chloraminehighest running annual average · range 0.6 to 4.8 · Distribution system · 2025 report, page 12 | 3.2 ppm | None set | 4 ppm | Below the legal limit |
| Copper90th percentile of 85 homes tested, 0 over the action level · Customer taps · 2025 report, page 11 | 0.1 ppm | 0.3 ppm | 1.3 ppm (action level) | Below the health goal |
| Disinfection byproducts (HAA5)highest running annual average · range 4 to 57 · Distribution system · 2025 report, page 12 | 34 ppb | None set | 60 ppb | Below the legal limit |
| Disinfection byproducts (TTHM)highest running annual average · range 14 to 32 · Distribution system · 2025 report, page 12 | 28 ppb | None set | 80 ppb | Below the legal limit |
| Fluorideaverage · range 0.22 to 0.86 · Carrollton plant · 2025 report, page 11 | 0.65 ppm | 1 ppm | 4 ppm | Below the health goal |
| Simazinehighest measured · range ND to 0.08 · Carrollton plant · 2025 report, page 12 | 0.08 ppb | 4 ppb | 4 ppb | Below the health goal |
| Turbidity (cloudiness)highest measured · range 0.03 to 0.97 · listed as a violation in the report · Carrollton plant · 2025 report, page 11 | 0.97 NTU | None set | 1 NTU | Below the legal limit |
Utility results describe the whole system, measured where water enters the pipes, not your tap. Your home’s plumbing can add lead or copper. 1 number we weren’t sure about is held back until a person checks.
EPA testing for PFAS and lithium
EPA’s own nationwide testing (UCMR 5) found these in New Orleans Carrollton Ww’s water between Mar 2023 and Mar 2025. These are EPA lab results, separate from the district’s report. Anything not listed was not detected.
- PFOA4.1 pptFound in 2 of 12 samples · highest resultAbove the federal limit that takes effect in 2029 (4 ppt)
- PFOS4.2 pptFound in 2 of 12 samples · highest resultAbove the federal limit that takes effect in 2029 (4 ppt)
- HFPO-DA (GenX)5.4 pptFound in 1 of 12 samples · highest resultNo federal limit in force for this one
- Lithium14 ppbFound in 3 of 12 samples · highest resultAbove EPA’s health reference level of 10 ppb (a guide, not a legal limit)
Source: EPA UCMR 5 occurrence data. The highest single result is shown; one high sample doesn’t mean every glass is that high.
What you can do
Nothing here is an emergency notice: if the district has a violation, it must tell customers directly. If you’d like to lower these at your tap, these are the treatments that remove them, and the catalog shows the models certified for each. Ranking is by certified removal; commissions never change the order.
Bacteria and viruses
Found: Total coliform bacteria
What removes it: UV purification (and tell your utility).
Industrial chemicals and pesticides
Found: Atrazine
What removes it: Carbon block or RO.
Radium and uranium
Found: Gross beta (radioactivity), Radium (combined 226 + 228), Radium-226, Radium-228
What removes it: Reverse osmosis.
Lead
Found: Lead
What removes it: Certified carbon block or RO.
PFAS ("forever chemicals")
Found: PFOA (a PFAS), PFOS (a PFAS), PFOA (EPA testing), PFOS (EPA testing)
What removes it: Reverse osmosis.
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