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Tap water quality report

Clewiston, FL

EPA monitoring detected 8 contaminants across the 2 water suppliers serving Clewiston. 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
14,141
people served
8
contaminants found
Florida rankings Lead in Florida PFAS in Florida

What was found in Clewiston'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
820 µg/L 21%
of the EPA limit 4000 µg/L
Main supplier: CLEWISTON, CITY OF · 9,643 people · 2017
1/2 SYR4
Nitrate
210 µg/L 2.1%
of the EPA limit 10000 µg/L
Main supplier: CLEWISTON, CITY OF · 9,643 people · 2019
1/2 SYR4
Nitrite
48 µg/L 4.8%
of the EPA limit 1000 µg/L
Main supplier: CLEWISTON, CITY OF · 9,643 people · 2019
1/2 SYR4
TTHM
4.9 µg/L 6.1%
of the EPA limit 80 µg/L
Main supplier: CLEWISTON, CITY OF · 9,643 people · 2019
Highest in the city: 42 µg/L — SOUTH SHORE WATER ASSN., INC. · 4,498 people · 2019
2/2 SYR4
Total Haloacetic Acids (HAA5)
7.431 µg/L 12%
of the EPA limit 60 µg/L
Main supplier: CLEWISTON, CITY OF · 9,643 people · 2019
Highest in the city: 18.475 µg/L — SOUTH SHORE WATER ASSN., INC. · 4,498 people · 2019
2/2 SYR4
Barium
1.7 µg/L 0.1%
of the EPA limit 2000 µg/L
Main supplier: CLEWISTON, CITY OF · 9,643 people · 2017
1/2 SYR4
Selenium
0.2000 µg/L 0.4%
of the EPA limit 50 µg/L
Main supplier: CLEWISTON, CITY OF · 9,643 people · 2017
1/2 SYR4
Lead
0.00030 mg/L 2%
of the EPA limit 0.0150 mg/L
Main supplier: CLEWISTON, CITY OF · 9,643 people · 2023
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 Clewiston

SupplierPopulation served
CLEWISTON, CITY OF 9,643
SOUTH SHORE WATER ASSN., INC. 4,498

Frequently asked questions about Clewiston tap water

Is Clewiston tap water safe to drink?

EPA testing detected 8 contaminants in the water serving Clewiston. 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 Clewiston?

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

What contaminants are in Clewiston's water?

The contaminants EPA monitoring detected in Clewiston include Fluoride, Nitrate, Nitrite, TTHM, Total Haloacetic Acids (HAA5). 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.