Grand Bay is the last Alabama community on I-10 before the Mississippi line — exit 4, with US-90 running parallel a few miles north. The Grand Bay Savanna, a coastal-plain pine-flat ecosystem, sits south of town and keeps groundwater levels unusually close to the surface across much of the area. Census data puts the median year built at 1984 across about 1,880 housing units, with zero pre-1939 structures recorded — a young residential stock spread across the Festival Park Road and Highway 188 corridors rather than a dense historic core.
Water service is a mix of Mobile County Water, Sewer & Fire Protection Authority districts and private wells, and which side of that line a particular address falls on materially changes the install conversation. MCWSFPA-served homes follow utility-side patterns; well households carry the full testing-and-treatment responsibility themselves.
Shallow coastal wells in the savanna zone routinely test high for iron and hydrogen sulfide, and proximity to Mississippi Sound makes chloride monitoring a sensible baseline for any private well within a few miles of the coast. For a Grand Bay well household we install the softener for the underlying hardness and a kitchen-tap RO for drinking water. Iron and hydrogen sulfide in the shallow coastal wells need dedicated treatment that sits outside what we install — the free in-home test establishes which of the three is actually driving the complaint, and we will tell you plainly when the answer is not something we sell.