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Tap water quality report

St Augustine, IL

EPA monitoring detected 12 contaminants across the 1 water supplier serving St Augustine. A detection doesn't automatically mean the water is unsafe — see the level at the main supplier for each below, with its EPA source and period.

1
water supplier
119
people served
12
contaminants found
Illinois rankings Lead in Illinois PFAS in Illinois

What was found in St Augustine's water

The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Nitrate-Nitrite
1224 µg/L 12%
of the EPA limit 10000 µg/L
Main supplier: ST AUGUSTINE · 119 people · 2019
1/1 SYR4
Nitrite
1200 µg/L 120%
of the EPA limit, at the 95th percentile of samples — 1000 µg/L
Main supplier: ST AUGUSTINE · 119 people · 2019
1/1 SYR4
Fluoride
778.6 µg/L 19%
of the EPA limit 4000 µg/L
Main supplier: ST AUGUSTINE · 119 people · 2018
1/1 SYR4
Nitrate
732.5 µg/L 7.3%
of the EPA limit 10000 µg/L
Main supplier: ST AUGUSTINE · 119 people · 2019
1/1 SYR4
Copper
271 µg/L 21%
of the EPA limit 1300 µg/L
Main supplier: ST AUGUSTINE · 119 people · 2019
1/1 SYR4
Barium
149 µg/L 7.5%
of the EPA limit 2000 µg/L
Main supplier: ST AUGUSTINE · 119 people · 2018
1/1 SYR4
Arsenic
5.41 µg/L 54%
of the EPA limit 10 µg/L
Main supplier: ST AUGUSTINE · 119 people · 2018
1/1 SYR4
Lead
4.06 µg/L 27%
of the EPA limit 15 µg/L
Main supplier: ST AUGUSTINE · 119 people · 2019
1/1 SYR4
Chloroform
1.31 µg/L
No EPA limit set
Main supplier: ST AUGUSTINE · 119 people · 2017
1/1 SYR4
TTHM
1.31 µg/L 1.6%
of the EPA limit 80 µg/L
Main supplier: ST AUGUSTINE · 119 people · 2017
1/1 SYR4
Combined Radium (-226 And -228)
0.6900 pCi/L 14%
of the EPA limit 5 pCi/L
Main supplier: ST AUGUSTINE · 119 people · 2014
1/1 SYR4
Lead
0.0100 mg/L 67%
of the EPA limit 0.0150 mg/L
Main supplier: ST AUGUSTINE · 119 people · 2025
1/1 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. These are the utilities' own EPA-reported results, not a city-wide average. A detection means the lab measured the substance — it isn't the same as exceeding a legal limit. Hover a source tag to see the EPA program and years behind each figure.

Water suppliers serving St Augustine

SupplierPopulation served
ST AUGUSTINE 119

Frequently asked questions about St Augustine tap water

Is St Augustine tap water safe to drink?

EPA testing detected 12 contaminants in the water serving St Augustine. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.

How many water suppliers serve St Augustine?

1 public water supplier report drinking-water monitoring for St Augustine, Illinois to the EPA. Each is listed above with its population served.

What contaminants are in St Augustine's water?

The contaminants EPA monitoring detected in St Augustine include Nitrate-Nitrite, Nitrite, Fluoride, Nitrate, Copper. The full list, with the level at the main supplier and the data source, is in the table above.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.