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Water Quality Report

Seneca, IL

LaSalle County · 2,353 residents · 1 water system

7

Contaminants detected

0

PFAS compounds

—

Hardness (mg/L)

1

Above legal limits

0

Above health guidelines

Seneca drinking water comes from groundwater wells. Based on the most recent monitoring data, 7 contaminants have been detected in the water supply, including Lead, Nitrate, Radium, Total Trihalomethanes, and 3 others.

Contaminants detected in Seneca water

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

Lead0 / 0.015 mg/L
0% of EPA limit
Nitrate0.08 / 10 mg/L
1% of EPA limit
Radium6.4 / 5 pCi/L
128% of EPA limit
11% of EPA limit
3% of EPA limit
Barium0.0346 / 2 mg/L
2% of EPA limit
Fluoride0.652 / 4 mg/L
16% of EPA limit
Microplastics (not routinely tested)

Other cities in LaSalle County

Water quality reports for nearby Illinois communities.

Frequently asked questions

Is Seneca, IL tap water safe to drink?
Seneca tap water has 1 contaminant currently measured above EPA legal standards (Maximum Contaminant Levels). 7 contaminants have been detected in the water supply, including Lead, Nitrate, Radium, 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 Seneca water?
Monitoring has detected 7 contaminants in Seneca's water supply: Lead, Nitrate, Radium, Total Trihalomethanes, Haloacetic Acids (HAA5), Barium, Fluoride. 1 of these are above EPA legal limits. See individual system reports for concentrations relative to EPA limits.
Where does Seneca get its drinking water?
Seneca'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. Seneca is served by one water system: SENECA.

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