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Tap water quality report

Guin, AL

EPA monitoring detected 12 contaminants across the 3 water suppliers serving Guin. 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.

3
water suppliers
8,814
people served
12
contaminants found
Alabama rankings Lead in Alabama PFAS in Alabama

What was found in Guin'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
1146.25 µg/L 29%
of the EPA limit 4000 µg/L
Main supplier: GUIN WATER & SEWER BOARD · 4,350 people · 2019
1/3 SYR4
Nitrate
370 µg/L 3.7%
of the EPA limit 10000 µg/L
Main supplier: GUIN WATER & SEWER BOARD · 4,350 people · 2019
1/3 SYR4
Nitrate-Nitrite
363.9 µg/L 3.6%
of the EPA limit 10000 µg/L
Main supplier: GUIN WATER & SEWER BOARD · 4,350 people · 2019
1/3 SYR4
Copper
158.2 µg/L 12%
of the EPA limit 1300 µg/L
Main supplier: GUIN WATER & SEWER BOARD · 4,350 people · 2019
Highest in the city: 283 µg/L — MARION COUNTY PUBLIC WATER AUTHORITY · 3,660 people · 2018
3/3 SYR4
TTHM
81.975 µg/L 102%
of the EPA limit, at the 95th percentile of samples — 80 µg/L
Main supplier: GUIN WATER & SEWER BOARD · 4,350 people · 2019
3/3 SYR4
Total Haloacetic Acids (HAA5)
73.3 µg/L 122%
of the EPA limit, at the 95th percentile of samples — 60 µg/L
Main supplier: GUIN WATER & SEWER BOARD · 4,350 people · 2019
3/3 SYR4
Barium
38.584999999999994 µg/L 1.9%
of the EPA limit 2000 µg/L
Main supplier: GUIN WATER & SEWER BOARD · 4,350 people · 2019
1/3 SYR4
Chloroform
31.199999999999996 µg/L
No EPA limit set
Main supplier: GUIN WATER & SEWER BOARD · 4,350 people · 2019
1/3 SYR4
Bromodichloromethane
3.395 µg/L
No EPA limit set
Main supplier: GUIN WATER & SEWER BOARD · 4,350 people · 2019
1/3 SYR4
Gross Alpha, Excl. Radon And U
2.6 pCi/L 17%
of the EPA limit 15 pCi/L
Main supplier: GUIN WATER & SEWER BOARD · 4,350 people · 2016
1/3 SYR4
Chromium
1.32 µg/L 1.3%
of the EPA limit 100 µg/L
Main supplier: GUIN WATER & SEWER BOARD · 4,350 people · 2019
1/3 SYR4
Lead
0.0021 mg/L 14%
of the EPA limit 0.0150 mg/L
Main supplier: GUIN WATER & SEWER BOARD · 4,350 people · 2025
3/3 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 Guin

SupplierPopulation served
GUIN WATER & SEWER BOARD 4,350
MARION COUNTY PUBLIC WATER AUTHORITY 3,660
TWIN WATER AUTHORITY 804

Frequently asked questions about Guin tap water

Is Guin tap water safe to drink?

EPA testing detected 12 contaminants in the water serving Guin. 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 Guin?

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

What contaminants are in Guin's water?

The contaminants EPA monitoring detected in Guin 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.