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Tap water quality report

Winona, MS

EPA monitoring detected 1 contaminant across the 11 water suppliers serving Winona. 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.

11
water suppliers
9,772
people served
1
contaminants found
Mississippi rankings Lead in Mississippi PFAS in Mississippi

What was found in Winona'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
Lead
0.0032 mg/L 21%
of the EPA limit 0.0150 mg/L
Main supplier: CITY OF WINONA · 5,071 people · 2024
Highest in the city: 0.0048 mg/L — HAYS CREEK W/A - ALVA · 750 people · 2023
11/11 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 Winona

SupplierPopulation served
CITY OF WINONA 5,071
SOUTH WINONA WATER ASSOCIATION 874
HAYS CREEK W/A - ALVA 750
HAYS CREEK W/A-MINERVA #2 750
NORTH DISTRICT 1 WATER ASSN. 700
51-55 WATER ASSOCIATION 441
HAYS CREEK W/A-LODI 441
HAYS CREEK W/A-MINERVA 372
HAYS CREEK W/A-NEW LIBERTY 193
HAYS CREEK W/A-MISSION ROAD 98
HAYS CREEK W/A-LEGION LAKE RD 82

Frequently asked questions about Winona tap water

Is Winona tap water safe to drink?

EPA testing detected 1 contaminant in the water serving Winona. 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 Winona?

11 public water suppliers report drinking-water monitoring for Winona, Mississippi to the EPA. Each is listed above with its population served.

What contaminants are in Winona's water?

The contaminants EPA monitoring detected in Winona include Lead. 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.