What was found in ZIP 55331
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 |
|---|---|---|---|
| Copper | 646.45 µg/L 50% of the EPA limit 1300 µg/L Main supplier: Shorewood · 3,890 people · 2017
Highest in the ZIP: 1170 µg/L — LAKESIDE ESTATES · 460 people · 2017 | 2/2 | SYR4 |
| Fluoride | 1145 µg/L 29% of the EPA limit 4000 µg/L Main supplier: Shorewood · 3,890 people · 2019 | 1/2 | SYR4 |
| Nitrate-Nitrite | 50 µg/L 0.5% of the EPA limit 10000 µg/L Main supplier: Shorewood · 3,890 people · 2019 | 1/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 22.17 µg/L 37% of the EPA limit 60 µg/L Highest in the ZIP: LAKESIDE ESTATES · 460 people · 2019 | 1/2 | SYR4 |
| TTHM | 12.64 µg/L 16% of the EPA limit 80 µg/L Highest in the ZIP: LAKESIDE ESTATES · 460 people · 2019 | 1/2 | SYR4 |
| Lithium | 12 µg/L No EPA limit set Main supplier: Shorewood · 3,890 people · 2025 | 1/2 | UCMR-5 |
| Gross Alpha, Excl. Radon And U | 10.2 pCi/L 68% of the EPA limit 15 pCi/L Main supplier: Shorewood · 3,890 people · 2019 | 1/2 | SYR4 |
| Lead | 8.08 µg/L 54% of the EPA limit 15 µg/L Main supplier: Shorewood · 3,890 people · 2017 | 2/2 | SYR4 |
| Arsenic | 6.0715 µg/L 61% of the EPA limit 10 µg/L Main supplier: Shorewood · 3,890 people · 2017 | 1/2 | SYR4 |
| Dichloroacetic Acid | 2.775 µg/L No EPA limit set Main supplier: Shorewood · 3,890 people · 2019 | 1/2 | SYR4 |
| Chloroform | 1.35 µg/L No EPA limit set Main supplier: Shorewood · 3,890 people · 2019 | 1/2 | SYR4 |
| Trichloroacetic Acid | 1.2 µg/L No EPA limit set Main supplier: Shorewood · 3,890 people · 2019 | 1/2 | SYR4 |
| Pfba | 0.0130 µg/L No EPA limit set Main supplier: Shorewood · 3,890 people · 2025 | 1/2 | UCMR-5 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: Shorewood · 3,890 people · 2023
Highest in the ZIP: 0.0010 mg/L — LAKESIDE ESTATES · 460 people · 2024 | 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 55331
| Supplier | State | Population served |
|---|---|---|
| Shorewood | MN | 3,890 |
| LAKESIDE ESTATES | SD | 460 |
Frequently asked questions about ZIP 55331 tap water
Is the tap water in ZIP 55331 safe to drink?
EPA testing detected 14 contaminants across the water suppliers serving ZIP 55331. 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 55331?
2 public water suppliers report EPA drinking-water monitoring for ZIP 55331. Each is listed above with its population served.
What contaminants are in ZIP 55331's water?
EPA monitoring detected Copper, Fluoride, Nitrate-Nitrite, Total Haloacetic Acids (HAA5), TTHM, and others across this ZIP's suppliers. The full list with levels and sources is above.