What was found in ZIP 55987
The level at this ZIP's main supplier, the highest level anywhere in it, the EPA limit for each, and where the figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Fluoride | 1400 µg/L 35% of the EPA limit 4000 µg/L Main supplier: Winona · 27,782 people · 2019 | 2/2 | SYR4 |
| Copper | 124.1 µg/L 9.5% of the EPA limit 1300 µg/L Main supplier: Winona · 27,782 people · 2019
Highest in the ZIP: 1191.5 µg/L — Goodview · 4,158 people · 2019 | 2/2 | SYR4 |
| Nitrate-Nitrite | 140 µg/L 1.4% of the EPA limit 10000 µg/L Main supplier: Winona · 27,782 people · 2019 | 1/2 | SYR4 |
| Lead | 4.42 µg/L 29% of the EPA limit 15 µg/L Main supplier: Winona · 27,782 people · 2019
Highest in the ZIP: 60.08 µg/L — Goodview · 4,158 people · 2019 | 2/2 | SYR4 |
| Barium | 56.495 µg/L 2.8% of the EPA limit 2000 µg/L Main supplier: Winona · 27,782 people · 2019 | 2/2 | SYR4 |
| Lithium | 50.1 µg/L No EPA limit set Main supplier: Winona · 27,782 people · 2024 | 2/2 | UCMR-5 |
| Gross Alpha, Excl. Radon And U | 11.75 pCi/L 78% of the EPA limit 15 pCi/L Main supplier: Winona · 27,782 people · 2019 | 2/2 | SYR4 |
| Bromoform | 11.04 µg/L No EPA limit set Main supplier: Winona · 27,782 people · 2019 | 2/2 | SYR4 |
| Dibromoacetic Acid | 5.94 µg/L No EPA limit set Main supplier: Winona · 27,782 people · 2019 | 1/2 | SYR4 |
| Dibromochloromethane | 5.625 µg/L No EPA limit set Main supplier: Winona · 27,782 people · 2019 | 1/2 | SYR4 |
| Bromodichloromethane | 2.13 µg/L No EPA limit set Main supplier: Winona · 27,782 people · 2019 | 1/2 | SYR4 |
| Dichloroacetic Acid | 1.29 µg/L No EPA limit set Main supplier: Winona · 27,782 people · 2019 | 1/2 | SYR4 |
| Chloroform | 0.9600 µg/L No EPA limit set Main supplier: Winona · 27,782 people · 2019 | 1/2 | SYR4 |
| Chromium | 0.3860 µg/L 0.4% of the EPA limit 100 µg/L Main supplier: Winona · 27,782 people · 2019 | 1/2 | SYR4 |
| Mercury | 0.0320 µg/L 1.6% of the EPA limit 2 µg/L Highest in the ZIP: Goodview · 4,158 people · 2019 | 1/2 | SYR4 |
| Lead | 0.0020 mg/L 13% of the EPA limit 0.0150 mg/L Main supplier: Winona · 27,782 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.
Water suppliers serving ZIP 55987
Frequently asked questions about ZIP 55987 tap water
Is the tap water in ZIP 55987 safe to drink?
EPA testing detected 16 contaminants across the water suppliers serving ZIP 55987. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and your utility's annual Consumer Confidence Report for the official status.
Which water suppliers serve ZIP 55987?
2 public water suppliers report EPA drinking-water monitoring for ZIP 55987. Each is listed above with its population served.
What contaminants are in ZIP 55987's water?
EPA monitoring detected Fluoride, Copper, Nitrate-Nitrite, Lead, Barium, and others across this ZIP's suppliers. The full list with levels and sources is above.