A precautionary boil water advisory has been issued for the Cheniere side of Grand Isle, Louisiana, after a recent system pressure loss raised concerns about potential contamination within the local distribution lines. The advisory was announced by the Jefferson Parish Water Department in coordination with the Louisiana Department of Health, following reports of pressure instability affecting customers on the western side of the island.
Officials note that while contamination has not been confirmed, any drop in system pressure increases the risk of untreated water entering pipes. The advisory will remain in place until laboratory analysis confirms the water is safe.
What Residents Should Do Right Now
Residents are advised to take the following steps until the advisory is lifted:
- Bring all tap water to a rolling boil for at least one full minute before drinking, cooking, washing produce, or brushing teeth.
- Use boiled or bottled water for preparing baby formula, beverages, coffee makers, and ice.
- Throw away any ice made after the pressure loss and turn off automatic icemakers.
- Run taps briefly if water appears cloudy, then boil before use.
These precautions ensure harmful microbes are neutralised before consumption.
What NOT to Do During the Advisory
Residents should avoid:
- Drinking unboiled tap water, even if it appears normal.
- Using refrigerator or pitcher filters as substitutes — these are not designed to remove bacteria.
- Preparing infant formula or food using unboiled water.
- Using ice from household icemakers until several cycles of safe water have flushed the system.
These steps are standard public-health precautions during pressure-related advisories in Louisiana.
Why the Advisory Was Issued
Water systems along barrier islands like Grand Isle are particularly sensitive to pressure disruptions from repairs, line breaks, or environmental conditions. When pressure drops:
- Chlorine disinfectant levels may decline
- Soil, sand, or untreated water can infiltrate pipes
- Sediment may become dislodged
- Bacterial contamination becomes possible
Louisiana law requires a boil advisory anytime system pressure falls below acceptable thresholds. After pressure is restored, the utility must collect bacteriological samples and follow a strict testing protocol. The advisory will remain active until test results confirm the water is safe.
Extra Protection for Homes After the Advisory Ends
Once the advisory is lifted, some households choose to add an extra layer of protection against future disruptions. A certified NSF/ANSI 58 reverse-osmosis system can help reduce contaminants such as PFAS, sediment, dissolved solids, and disinfection byproducts — providing added peace of mind for residents on coastal systems where main-line repairs and pressure fluctuations are more common. View Waterdrop Reverse Osmosis System
Sources & Notes
- Jefferson Parish Water Department — Public boil-water advisory notices
https://www.jeffparish.net - Louisiana Department of Health — Boil-water notice guidelines and pressure-loss rules
https://ldh.la.gov - Local reporting on Grand Isle water advisories and pressure-loss events
https://www.nola.com
Check your water now!
We have translated and compiled water reports on every state in the US, and covered over 100 cities. Find out how good your water is today!

Please read – our information
The information presented on cleanairandwater.net is compiled from official water quality reports, trusted news sources, government websites, and public health resources. While we strive for accuracy and thoroughness in our presentations, we are not scientists, engineers, or qualified water quality professionals.
Our mission is to present water quality information in an accessible, real-world format that helps people understand what’s in their water and make informed decisions about their health and safety. We believe that complex environmental information should be available to everyone in a format that’s easy to understand.
We make every effort to ensure our content is current and accurate, but we cannot guarantee that all information is complete or error-free. This website should not replace official communications from your local water utility or health department. We always recommend consulting official sources for the most up-to-date information regarding your specific water system.
Clean Air and Water is not liable for any unintentional errors, omissions, or outdated information. The content on this site is provided for informational purposes only and should not be considered professional advice.


