New Orleans is served by two separate water systems with separate data, separate compliance histories and separate state grades. The East Bank, served by the Carrollton plant, covers about 334,903 people. Algiers on the West Bank, served by its own plant, covers 52,785. Most articles about New Orleans water merge them. They should not be merged, because they perform differently.
Is there a boil water advisory in New Orleans right now?
No. As of August 16, 2026, all advisories have been lifted.
But New Orleans issues these often enough that the question deserves a real answer rather than a snapshot. Here is 2026 so far.
| Date | Area | Cause | Contamination found? |
|---|---|---|---|
| Mar 9 to 10 | Much of the East Bank including the French Quarter, CBD, Uptown, Mid City, Gentilly | 48-inch main break at Carrollton and Panola, pressure fell below 20 psi | No. All samples tested negative |
| Jul 25 to 26 | Entire West Bank | Pressure below 20 psi. Initially blamed on tower maintenance, then SWBNO said it could not confirm the cause | No |
| Aug 8 to 13 | West Bank, then Memorial Park in Algiers | Contractor damaged a main near General DeGaulle Drive | Yes. Two Memorial Park samples tested positive for E. coli and coliform |
| Aug 10 | Venetian Isles | Pressure below 20 psi, cause not identified | No |
The August 8 Memorial Park event was different. Testing actually found E. coli and coliform bacteria at two locations. E. coli cleared by Tuesday, coliform persisted, and a third round of testing came back clear before the advisory lifted the week of August 10. That was a genuine contamination event, and it was the second West Bank advisory in two weeks.
How much lead is in New Orleans tap water?
The 90th percentile is 6 ppb in both systems, against a 15 ppb action level. That passes.
The individual sample ranges tell you more than the headline figure does.
| System | 90th percentile | Samples over 15 ppb | Highest single tap |
|---|---|---|---|
| East Bank | 6 ppb | 2 of 85 | 23 ppb |
| Algiers | 6 ppb | 2 of 52 | 100 ppb |
That 100 ppb reading is nearly seven times the action level. It is one tap, and the system passes because compliance is judged on the 90th percentile rather than the maximum. But it is a real measurement from a real home, and it illustrates exactly why a citywide average cannot tell you what is coming out of your own faucet.
SWBNO states there is no detectable lead in water leaving its treatment plants. Lead enters through service lines and household plumbing, which in New Orleans is a substantial known problem.
How many lead pipes does New Orleans still have?
SWBNO launched a service line inventory in November 2024 covering roughly 278,000 service lines. The results so far:
- About 15,000 customers have confirmed lead pipes requiring replacement
- About 119,000 have pipe material recorded as unknown
That second number is the important one. Unknown is not the same as safe. It means the material has not yet been identified, and until it is, those households cannot rule lead out.
SWBNO has secured $86 million from the State Revolving Fund and applied for a further $66 million. The federal deadline to remove all lead service lines is December 31, 2037. In the interim the utility is running inspections and replacements at schools and childcare facilities, and offers free filter pitchers to households with lead, galvanised or unknown pipes.
You can check your own address through SWBNO’s lookup tool. If your result is lead or unknown, take the free pitcher and use it for drinking and cooking.
Does New Orleans water have PFAS?
Yes, detected, and below the federal limits.
| Compound | East Bank | Algiers | Federal limit |
|---|---|---|---|
| PFOA | average 1.7 ppt | average 1.7 ppt | 4.0 ppt |
| PFOS | average 2.0 ppt | average 2.2 ppt | 4.0 ppt |
| PFHxS, PFNA, GenX, PFBS | Not detected | Not detected | 10 ppt each |
These sit at roughly half the enforceable limit. EPA finalised these standards in April 2024 and utilities have until 2029 to comply, so New Orleans is already inside the target ahead of the deadline.
Worth knowing: the health goal EPA set for both PFOA and PFOS is zero. The 4.0 ppt figure is the enforceable limit, set at what is feasibly measurable and treatable. Detected-but-compliant is genuinely different from not-detected, and New Orleans is in the first category while cities like Houston and Orlando are in the second.
Where does New Orleans water come from?
The Mississippi River, for both systems. The Carrollton plant treats about 137 million gallons a day and Algiers about 13 million.
State assessors rate the source water susceptibility as high, though the report notes this applies to most surface water sources regardless of whether specific contamination sources have been identified. A river running past industry and agriculture carries more treatment burden than a protected aquifer.
Treatment is ferric sulfate coagulation, flocculation, chloramine disinfection, lime for corrosion control, fluoride, and rapid gravity filtration. Zinc orthophosphate, an additional corrosion control agent that reduces lead leaching, is currently a pilot on the West Bank only, not system-wide.
What did the January 2025 freeze do to the water?
It caused a health-based violation in both systems, and this is the most significant compliance event in the recent record.
Unusually high treatment rates during freeze-related demand pushed turbidity out of compliance. At Carrollton, treated water exceeded the turbidity threshold in 6.5 percent of monthly measurements against a 5 percent ceiling. At Algiers, a single reading exceeded the maximum limit on the night of January 22.
Turbidity is cloudiness. It has no direct health effect, but particles can shield microorganisms from disinfection, which is why it is regulated as a treatment technique. SWBNO states that testing during the violation period found no bacteria in the water. Both systems returned to compliance on April 22, 2025.
The same month, Carrollton triggered a Level 2 coliform assessment after more than 5 percent of samples tested positive. The positives were traced to a single street affected by construction work. The line was flushed and every month from February to December 2025 came back negative.
What is the full violation history?
This is where the two systems diverge sharply.
| System | Total violations | Health-based | Current status |
|---|---|---|---|
| East Bank (Carrollton) | 6 | 1, the Jan 2025 turbidity event | All resolved |
| Algiers | 9 | 7 | All resolved |
Algiers had six health-based violations between 2018 and 2022 for failing to remove enough total organic carbon, a treatment technique requirement. All returned to compliance on December 31, 2022, plus the January 2025 turbidity violation.
The state’s own scoring reflects the recovery. Louisiana Department of Health graded the systems in 2025 at B for Carrollton, 82 out of 100, up from a D at 64 in 2023. Algiers scored A at 95, up from B at 85. The state notes a low grade does not imply unsafe water; it flags long-term viability concerns.
How hard is New Orleans tap water?
We do not know, and neither does anyone else publishing a number.
The 2025 report contains no hardness value. SWBNO says hardness is monitored for treatment control but publishes no figure. Commercial water softener websites give values ranging from 2.6 to 7.2 grains per gallon, several falsely attributed to SWBNO reports, and they contradict each other.
Rather than repeat an unverifiable number, we will say this: Mississippi River supplies are generally moderately hard, and if you need an actual figure for your address, the SWBNO laboratory publishes a contact number for exactly this kind of request.
What about the disinfection byproducts?
Comfortably compliant, which may surprise you given the source water.
| Measure | East Bank | Algiers | Limit |
|---|---|---|---|
| TTHM | 28 ppb | 30 ppb | 80 ppb |
| HAA5 | 34 ppb | 33 ppb | 60 ppb |
Mississippi River water is high in organic matter, which typically drives disinfection byproducts up. New Orleans keeps them at roughly a third of the TTHM limit. For comparison, Orlando runs at 72 ppb and New York at 52. Individual HAA5 samples reached 57 and 53 respectively, but compliance is measured on the running annual average, so those are not exceedances.
Should you filter New Orleans tap water?
Yes, and the reason is specific rather than general.
The water leaving both treatment plants meets every standard. The chemistry is not the problem. The problem is what happens between the plant and your glass: aging pipes that break, pressure losses that trigger advisories, and roughly 119,000 service lines whose material nobody has yet confirmed.
- If your service line is lead or unknown, use a certified lead filter for drinking and cooking. SWBNO offers free pitchers for exactly these households. This is the single highest-value action available to you.
- Keep a filter regardless if you are in Algiers. The 100 ppb individual reading and the August E. coli event are both West Bank.
- During a boil water advisory, a filter is not enough. Filters do not reliably remove bacteria. Boil, or use bottled water, until the advisory is lifted.
SWBNO is mid-way through a major infrastructure programme, including a power complex to replace generators built between 1915 and 2012, with phase one costing roughly $255 million. 2025 was the first year the utility ran its full drainage system.
Frequently asked questions
Is New Orleans tap water safe to drink?
It meets every federal contaminant standard and there is no active advisory as of August 2026. Lead is 6 ppb at the 90th percentile against a 15 ppb limit, and PFOA and PFOS are detected but below the 4.0 ppt federal limits. The genuine concern is distribution infrastructure rather than treatment, with four boil water advisories between March and August 2026.
Is there a boil water advisory in New Orleans right now?
No. All advisories were lifted as of August 16, 2026. The most recent covered parts of Algiers from August 8 and was fully lifted the week of August 10 after a third round of testing came back clear.
Did New Orleans water actually have E. coli?
Yes, in one specific case. During the August 2026 West Bank advisory, samples from two locations in the Memorial Park area of Algiers tested positive for E. coli and coliform. E. coli cleared within a day and coliform persisted slightly longer. The advisory lifted after a third clear round. The three other 2026 advisories were precautionary with no contamination found.
How much lead is in New Orleans water?
The 90th percentile is 6 ppb in both systems, against a 15 ppb action level. Two of 85 East Bank samples and two of 52 Algiers samples exceeded that level, with the highest individual reading being 100 ppb in Algiers. There is no detectable lead in water leaving the treatment plants; it comes from service lines and household plumbing.
How do I check if I have a lead pipe in New Orleans?
SWBNO runs an address lookup tool as part of its service line inventory. About 15,000 customers have confirmed lead pipes and about 119,000 have unknown pipe material. If your result is lead or unknown, SWBNO offers a free filter pitcher, and using it for drinking and cooking is worthwhile.
Does New Orleans water have PFAS?
Yes, at low levels. PFOA averages 1.7 ppt and PFOS averages 2.0 to 2.2 ppt depending on the system, against federal limits of 4.0 ppt each. Four other regulated PFAS compounds were not detected. New Orleans is compliant well ahead of the 2029 deadline.
Why does New Orleans have so many boil water advisories?
Because state rules require one whenever system pressure drops below 20 psi, and aging pipes break frequently. Most advisories are precautionary responses to main breaks and pressure losses, not to detected contamination. Three of the four 2026 advisories found no contamination at all.
Is Algiers water different from the East Bank?
Yes, they are separate systems with separate plants and separate records. Algiers had seven health-based violations historically against the East Bank’s one, but it scored higher in the state’s 2025 grading at A versus B. Algiers also had the highest individual lead reading at 100 ppb and both August 2026 advisories.
Where does New Orleans get its water?
The Mississippi River, for both systems. The Carrollton plant treats about 137 million gallons a day and Algiers about 13 million. State assessors rate source water susceptibility as high, which is typical for surface water supplies generally.
What happened to New Orleans water in January 2025?
Freeze-driven demand pushed treatment rates unusually high and caused turbidity violations in both systems. Carrollton exceeded the threshold in 6.5 percent of monthly measurements against a 5 percent ceiling, and Algiers exceeded the maximum on January 22. SWBNO states testing found no bacteria during the violation period, and both returned to compliance in April 2025.
Is New Orleans tap water safe for baby formula?
The treated water meets standards, but the lead question makes this address-specific. Check your service line material through SWBNO’s lookup. If it returns lead or unknown, use filtered water for formula. During any boil water advisory, use boiled or bottled water rather than filtered, since filters do not reliably remove bacteria.
Does a water filter work during a boil water advisory?
No, not for the purpose that matters. Standard carbon filters and pitchers are not designed to remove bacteria. During an advisory you need to boil water for one minute or use bottled water. Filters are for lead, chlorine and taste, which are everyday concerns rather than advisory concerns.
Related reading
- Is your city’s tap water safe? Reports by city
- Is Houston tap water safe to drink?
- Lead in drinking water: risks, testing and removal
- Best water filter pitchers, tested
- How boiling water makes it safe to drink
- Is tap water safe to drink? US overview
Sources
- Sewerage and Water Board of New Orleans, Annual Update and 2025 Consumer Confidence Report on Water Quality, published June 2026. PWS IDs LA1071009 (Carrollton) and LA1071001 (Algiers).
- EPA Safe Drinking Water Information System, complete violation records for both systems.
- SWBNO press releases covering the March, July and August 2026 boil water advisories.
- SWBNO lead service line inventory announcement, November 2024, and inventory map updated November 2025.
- Louisiana Department of Health 2025 water system grades.
- EPA PFAS National Primary Drinking Water Regulation, finalised April 2024.
