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Water Quality Report

Addison, IL

DuPage County · 38,017 residents · 1 water system

8

Contaminants detected

0

PFAS compounds

558

Hardness (mg/L)

0

Above legal limits

2

Above health guidelines

Addison drinking water comes from surface water. Based on the most recent monitoring data, 8 contaminants have been detected in the water supply, including Lead, Arsenic, Copper, Total Trihalomethanes, and 4 others. PFAS testing has been conducted with no detections. Water hardness is 558 mg/L (very hard), which can cause scale buildup in appliances and reduce soap effectiveness.

Contaminants detected in Addison water

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

Lead0.002 / 0.015 mg/L
13% of EPA limit
Arsenic0.0037 / 0.01 mg/L
38% of EPA limit
Copper90 / 1300 ug/L
7% of EPA limit
Total Trihalomethanes39.4 / 80 ug/L
49% of EPA limit
25% of EPA limit
Barium0.0397 / 2 mg/L
2% of EPA limit
Fluoride0.32 / 4 mg/L
8% of EPA limit
Phosphorus Total9 ug/L
Unregulated
PFAS (tested — none detected)
Microplastics (not routinely tested)

Other cities in DuPage County

Water quality reports for nearby Illinois communities.

Frequently asked questions

Is Addison, IL tap water safe to drink?
Addison tap water meets EPA legal standards (Maximum Contaminant Levels). However, 2 contaminants are present above independent health guidelines, which are often stricter than legal limits. 8 contaminants have been detected in the water supply, including Lead, Arsenic, Copper, Total Trihalomethanes, Haloacetic Acids (HAA5). View the detailed report for each water system to see specific levels and how they compare to both legal limits and health guidelines.
What contaminants are in Addison water?
Monitoring has detected 8 contaminants in Addison's water supply: Lead, Arsenic, Copper, Total Trihalomethanes, Haloacetic Acids (HAA5), Barium, Fluoride, Phosphorus Total. 2 exceed health guidelines. See individual system reports for concentrations relative to EPA limits.
Does Addison water have PFAS?
Addison's water has been tested for PFAS compounds with no detections. Testing was conducted as part of the EPA's Unregulated Contaminant Monitoring Rule (UCMR5) program.
Is Addison water hard?
Yes. Addison water has a hardness of 558 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 Addison get its drinking water?
Addison's drinking water comes from surface water sources. The water is treated and tested according to Illinois EPA and EPA requirements before distribution. Addison is served by one water system: ADDISON.

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