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Water Quality Report

Plymouth, WI

Sheboygan County · 11,708 residents · 3 water systems

9

Contaminants detected

1

PFAS compounds

351

Hardness (mg/L)

1

Above legal limits

5

Above health guidelines

Plymouth drinking water comes from groundwater wells. Based on the most recent monitoring data, 9 contaminants have been detected in the water supply, including Lead, Nitrate, Arsenic, Copper, and 5 others. PFAS compounds have been detected at trace levels in Plymouth water. Water hardness is 351 mg/L (very hard), which can cause scale buildup in appliances and reduce soap effectiveness.

Contaminants detected in Plymouth water

Detection does not necessarily mean unsafe levels. See individual reports for concentrations and EPA limits.

Lead0.0062 / 0.015 mg/L
41% of EPA limit
Nitrate4.1 / 10 mg/L
41% of EPA limit
Arsenic0.0028 / 0.01 mg/L
28% of EPA limit
Copper718 / 1300 ug/L
55% of EPA limit
Total Trihalomethanes27.1 / 80 ug/L
34% of EPA limit
9% of EPA limit
Nickel0.0026 mg/L
UnregulatedInorganic
Barium0.0522 / 2 mg/L
3% of EPA limit
Fluoride0.175 / 4 mg/L
4% of EPA limit
PFAS (1 compounds detected)
Microplastics (not routinely tested)

Other cities in Sheboygan County

Water quality reports for nearby Wisconsin communities.

Frequently asked questions

Is Plymouth, WI tap water safe to drink?
Plymouth tap water has 1 contaminant currently measured above EPA legal standards (Maximum Contaminant Levels), and 5 above independent health guidelines. 9 contaminants have been detected in the water supply, including Lead, Nitrate, Arsenic, Copper, Total Trihalomethanes. View the detailed report for each water system to see specific levels, how they compare to both legal limits and health guidelines, and what actions to take.
What contaminants are in Plymouth water?
Monitoring has detected 9 contaminants in Plymouth's water supply: Lead, Nitrate, Arsenic, Copper, Total Trihalomethanes, Haloacetic Acids (HAA5), Nickel, Barium, Fluoride. Additionally, 1 PFAS compounds have been detected at trace levels. 1 of these are above EPA legal limits. 5 exceed health guidelines. See individual system reports for concentrations relative to EPA limits.
Does Plymouth water have PFAS?
Yes. 1 PFAS compounds have been detected in Plymouth's water supply at trace levels. PFAS are sometimes called "forever chemicals" because they do not break down in the environment. The EPA has set Maximum Contaminant Levels for several PFAS compounds. View the detailed report for specific concentrations.
Is Plymouth water hard?
Yes. Plymouth water has a hardness of 351 mg/L (very hard). Hard water is not a health concern but can cause scale buildup in water heaters and appliances, reduce soap effectiveness, and leave mineral deposits. Water softeners or conditioning systems can address hardness.
Where does Plymouth get its drinking water?
Plymouth's drinking water comes from groundwater wells that draw from underground aquifers. The water is treated and tested according to Wisconsin DNR and EPA requirements before distribution. Plymouth is served by 3 water systems, the largest being PLYMOUTH UTILITIES (serving 8,964 people).

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