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Alabama Water Quality
470
Utilities in database
6.3M
Residents served
28%
On private wells
2
Key contaminants tracked
Drinking Water in Alabama
Alabama has 470 community water systems serving approximately 6.3 million residents. Primary water sources include groundwater. The most commonly reported contaminants include disinfection byproducts, nitrates. 28% of Alabama residents rely on private wells. ADEM holds primary enforcement authority under the Safe Drinking Water Act.
Utilities in Alabama
1–25 of 470Central Alabama Water System
AL0000738 · 585,000 served
Huntsville Utilities Water Dept.
AL0000882 · 310,107 served
City of Mobile, Bd. of W&s Comm. of the
AL0001005 · 279,000 served
City of Montgomery Ww&ssb
AL0001070 · 276,000 served
Tuscaloosa Water & Sewer
AL0001313 · 166,524 served
Madison County Water Department
AL0000888 · 119,100 served
City of Dothan Utilities
AL0000681 · 97,146 served
Limestone County Water & Sewer Auth.
AL0000833 · 90,900 served
Bessemer Water Service
AL0000737 · 86,091 served
City of Florence Water Department
AL0000783 · 77,766 served
Decatur, Municipal Ub of
AL0001084 · 77,103 served
Auburn Water Works
AL0000804 · 65,313 served
City of Fairhope
AL0000035 · 59,850 served
Anniston Alabama, the Wwsb of the City O
AL0000133 · 56,646 served
Cullman County Water Department
AL0000394 · 56,628 served
City of Madison, the W & Ww Board of the
AL0000885 · 54,114 served
Harvest-monrovia Water System
AL0000878 · 51,915 served
City of Foley, Utilities Board of the
AL0000036 · 50,919 served
City of Enterprise, the Wwb of the
AL0000296 · 48,000 served
Northeast Alabama Water Sewer and Fpd
AL0001422 · 47,070 served
City of Prattville, the Ww Board of the
AL0000017 · 46,614 served
City of Opelika, Ww Bd. of the
AL0000816 · 45,621 served
City of Gadsden, the Wwsb of the
AL0000577 · 44,637 served
Us Army Garrison-redstone Arsenal
AL0000899 · 44,472 served
City of Athens,the Water Works Bd of the
AL0000824 · 43,431 served
Key Contaminant Concerns in Alabama
Nitrates
Nitrate (NO₃⁻) is a nitrogen-containing compound that forms naturally through the decomposition of organic matter. At elevated concentrations — almost always from human activity — nitrate interferes with the blood's ability to carry oxygen. The United States produces over 23 million tons of nitrogen fertilizer annually, making agricultural runoff the dominant source of nitrate contamination.
DBPs
When utilities add chlorine to water to kill pathogens, it reacts with dissolved organic matter — leaves, algae, soil — to produce disinfection byproducts (DBPs). Over 600 DBPs have been identified. The EPA regulates two groups: total trihalomethanes (TTHMs, including chloroform) and haloacetic acids (HAA5). DBP levels tend to be highest in surface water systems and in warm months when organic matter is elevated.
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Data source: Utility data from EPA SDWIS. 470 active community water systems ingested. CCR contaminant data ingestion in progress.
Last updated: 2026-04-22