Serving Mobile + Baldwin County, AL
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Mobile County · PWSID AL0000971
Dauphin Island Water & Sewer Authority serves about 5,802 people across Dauphin Island. Below is what the EPA and the Environmental Working Group publish about it — the readings, the compliance record, and what each one means for the water coming out of your tap.
The readings below are system-wide averages. A free in-home test tells you what is coming out of your own faucet — no cost, no obligation.
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3 contaminants are reported above EWG health guidelines in Dauphin Island Water & Sewer water: Bromodichloromethane, Dibromochloromethane, Total trihalomethanes (TTHMs).
Every one of these is legal. Federal legal limits were mostly set decades ago; the EWG health guideline reflects more recent research on long-term exposure. The gap between the two columns is the point.
| Contaminant | Found | Health guideline | Legal limit |
|---|---|---|---|
| Bromodichloromethane | 0.530 ppb | 0.06 ppb | NO LEGAL LIMIT |
| Dibromochloromethane | 0.845 ppb | 0.1 ppb | NO LEGAL LIMIT |
| Total trihalomethanes (TTHMs) | 2.70 ppb | 0.15 ppb | 80 ppb |
Source: EWG Tap Water Database for PWSID AL0000971. View the full report
6 violation records on file between 1997 and 2022, and none of them are health-based — every one is a monitoring or reporting failure, meaning a required sample or report was late rather than a limit being exceeded.
That distinction matters more than the headline number. A monitoring-and-reporting violation means a required sample or report was late. A health-based violation means a limit was actually exceeded. Most published “violation counts” blend the two, which makes a diligent utility with sloppy paperwork look identical to one with a water-quality problem. 2 of these have no return-to-compliance date on file.
Source: EPA SDWIS, PWSID AL0000971. Look it up yourself
Most of what shows up on this system is disinfection by-product — the trade-off for water that arrives safe from bacteria. It is straightforward to remove at the point of use.
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We read hardness, chlorine and TDS and run a soap test in your kitchen, and explain what the numbers mean. No charge, and no obligation to buy anything.
