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Tap water quality report

Decatur, AL

EPA monitoring detected 16 contaminants across the 2 water suppliers serving Decatur. A detection doesn't automatically mean the water is unsafe — see the level at the main supplier for each below, with its EPA source and period.

2
water suppliers
107,103
people served
16
contaminants found
Alabama rankings Lead in Alabama PFAS in Alabama

What was found in Decatur's water

The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Fluoride
880 µg/L 22%
of the EPA limit 4000 µg/L
Main supplier: DECATUR, MUNICIPAL UB OF · 77,103 people · 2019
1/2 SYR4
Nitrate
620 µg/L 6.2%
of the EPA limit 10000 µg/L
Main supplier: DECATUR, MUNICIPAL UB OF · 77,103 people · 2019
Highest in the city: 760 µg/L — WEST MORGAN-EAST LAWRENCE W&S AUTHORITY · 30,000 people · 2019
2/2 SYR4
Nitrate-Nitrite
609.5 µg/L 6.1%
of the EPA limit 10000 µg/L
Main supplier: DECATUR, MUNICIPAL UB OF · 77,103 people · 2019
Highest in the city: 707.5 µg/L — WEST MORGAN-EAST LAWRENCE W&S AUTHORITY · 30,000 people · 2019
2/2 SYR4
Copper
297.6 µg/L 23%
of the EPA limit 1300 µg/L
Main supplier: DECATUR, MUNICIPAL UB OF · 77,103 people · 2019
2/2 SYR4
TTHM
43 µg/L 54%
of the EPA limit 80 µg/L
Main supplier: DECATUR, MUNICIPAL UB OF · 77,103 people · 2019
Highest in the city: 64.6 µg/L — WEST MORGAN-EAST LAWRENCE W&S AUTHORITY · 30,000 people · 2019
2/2 SYR4
Total Haloacetic Acids (HAA5)
32.94 µg/L 55%
of the EPA limit 60 µg/L
Main supplier: DECATUR, MUNICIPAL UB OF · 77,103 people · 2019
2/2 SYR4
Barium
21 µg/L 1.1%
of the EPA limit 2000 µg/L
Highest in the city: WEST MORGAN-EAST LAWRENCE W&S AUTHORITY · 30,000 people · 2019
1/2 SYR4
Lead
19 µg/L 127%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
Main supplier: DECATUR, MUNICIPAL UB OF · 77,103 people · 2019
2/2 SYR4
Chloroform
18.22 µg/L
No EPA limit set
Main supplier: DECATUR, MUNICIPAL UB OF · 77,103 people · 2019
2/2 SYR4
Bromodichloromethane
7.417 µg/L
No EPA limit set
Main supplier: DECATUR, MUNICIPAL UB OF · 77,103 people · 2019
Highest in the city: 10.92 µg/L — WEST MORGAN-EAST LAWRENCE W&S AUTHORITY · 30,000 people · 2019
2/2 SYR4
Dibromochloromethane
1.7875 µg/L
No EPA limit set
Main supplier: DECATUR, MUNICIPAL UB OF · 77,103 people · 2019
Highest in the city: 6.066 µg/L — WEST MORGAN-EAST LAWRENCE W&S AUTHORITY · 30,000 people · 2019
2/2 SYR4
1,2-Dichloroethane
1.1 µg/L 22%
of the EPA limit 5 µg/L
Highest in the city: WEST MORGAN-EAST LAWRENCE W&S AUTHORITY · 30,000 people · 2019
1/2 SYR4
Bromoform
0.9300 µg/L
No EPA limit set
Highest in the city: WEST MORGAN-EAST LAWRENCE W&S AUTHORITY · 30,000 people · 2019
1/2 SYR4
Pfba
0.0130 µg/L
No EPA limit set
Main supplier: DECATUR, MUNICIPAL UB OF · 77,103 people · 2024
1/2 UCMR-5
PFBS
0.0034 µg/L
No EPA limit set
Main supplier: DECATUR, MUNICIPAL UB OF · 77,103 people · 2024
1/2 UCMR-5
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
Main supplier: DECATUR, MUNICIPAL UB OF · 77,103 people · 2024
Highest in the city: 0.0028 mg/L — WEST MORGAN-EAST LAWRENCE W&S AUTHORITY · 30,000 people · 2025
2/2 LCR
Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the 95th percentile of the system's samples — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately. These are the utilities' own EPA-reported results, not a city-wide average. A detection means the lab measured the substance — it isn't the same as exceeding a legal limit. Hover a source tag to see the EPA program and years behind each figure.

Water suppliers serving Decatur

SupplierPopulation served
DECATUR, MUNICIPAL UB OF 77,103
WEST MORGAN-EAST LAWRENCE W&S AUTHORITY 30,000

Frequently asked questions about Decatur tap water

Is Decatur tap water safe to drink?

EPA testing detected 16 contaminants in the water serving Decatur. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.

How many water suppliers serve Decatur?

2 public water suppliers report drinking-water monitoring for Decatur, Alabama to the EPA. Each is listed above with its population served.

What contaminants are in Decatur's water?

The contaminants EPA monitoring detected in Decatur include Fluoride, Nitrate, Nitrate-Nitrite, Copper, TTHM. The full list, with the level at the main supplier and the data source, is in the table above.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.