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Water Quality Report

Woodstock, IL

McHenry County · 25,630 residents · 1 water system

8

Contaminants detected

4

PFAS compounds

—

Hardness (mg/L)

1

Above legal limits

1

Above health guidelines

Woodstock drinking water comes from groundwater wells. Based on the most recent monitoring data, 8 contaminants have been detected in the water supply, including Lead, Nitrate, Copper, Total Trihalomethanes, and 4 others. PFAS compounds have been detected at trace levels in Woodstock water.

Contaminants detected in Woodstock water

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

Lead0.007 / 0.015 mg/L
47% of EPA limit
Nitrate1.6 / 10 mg/L
16% of EPA limit
Copper1.5 / 1.3 mg/L
115% of EPA limit
Total Trihalomethanes42.4 / 80 ug/L
53% of EPA limit
39% of EPA limit
PFPeA (Perfluoropentanoic Acid)0.9 ng/L
UnregulatedPFAS
Orthophosphate550 ug/L
Unregulated
PFBA (Perfluorobutanoic Acid)1.2 ng/L
UnregulatedPFAS
PFAS (4 compounds detected)
Microplastics (not routinely tested)

Other cities in McHenry County

Water quality reports for nearby Illinois communities.

Frequently asked questions

Is Woodstock, IL tap water safe to drink?
Woodstock tap water has 1 contaminant currently measured above EPA legal standards (Maximum Contaminant Levels), and 1 above independent health guidelines. 8 contaminants have been detected in the water supply, including Lead, Nitrate, Copper, Total Trihalomethanes, Haloacetic Acids (HAA5). 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 Woodstock water?
Monitoring has detected 8 contaminants in Woodstock's water supply: Lead, Nitrate, Copper, Total Trihalomethanes, Haloacetic Acids (HAA5), PFPeA (Perfluoropentanoic Acid), Orthophosphate, PFBA (Perfluorobutanoic Acid). Additionally, 4 PFAS compounds have been detected at trace levels. 1 of these are above EPA legal limits. 1 exceed health guidelines. See individual system reports for concentrations relative to EPA limits.
Does Woodstock water have PFAS?
Yes. 4 PFAS compounds have been detected in Woodstock'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.
Where does Woodstock get its drinking water?
Woodstock's drinking water comes from groundwater wells that draw from underground aquifers. The water is treated and tested according to Illinois EPA and EPA requirements before distribution. Woodstock is served by one water system: WOODSTOCK.

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