What was found in Vienna'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.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Fluoride | 982.9 µg/L 25% of the EPA limit 4000 µg/L Main supplier: VIENNA · 1,618 people · 2019 | 2/3 | SYR4 |
| Chlorite | 937 µg/L 94% of the EPA limit 1000 µg/L Main supplier: VIENNA · 1,618 people · 2019
Highest in the city: 954 µg/L — VIENNA CORRECTIONAL CENTER · 501 people · 2019 | 2/3 | SYR4 |
| Nitrate | 120 µg/L 1.2% of the EPA limit 10000 µg/L Main supplier: VIENNA · 1,618 people · 2019
Highest in the city: 260 µg/L — VIENNA CORRECTIONAL CENTER · 501 people · 2019 | 2/3 | SYR4 |
| Copper | 132.4 µg/L 10% of the EPA limit 1300 µg/L Main supplier: VIENNA · 1,618 people · 2019 | 2/3 | SYR4 |
| Nitrate-Nitrite | 120 µg/L 1.2% of the EPA limit 10000 µg/L Main supplier: VIENNA · 1,618 people · 2018 | 2/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 15.85 µg/L 26% of the EPA limit 60 µg/L Main supplier: VIENNA · 1,618 people · 2019
Highest in the city: 66.535 µg/L — VIENNA CORRECTIONAL CENTER · 501 people · 2019 | 2/3 | SYR4 |
| TTHM | 6.744 µg/L 8.4% of the EPA limit 80 µg/L Main supplier: VIENNA · 1,618 people · 2019
Highest in the city: 58.7815 µg/L — VIENNA CORRECTIONAL CENTER · 501 people · 2019 | 2/3 | SYR4 |
| Chloroform | 6.744 µg/L No EPA limit set Main supplier: VIENNA · 1,618 people · 2019
Highest in the city: 52.775 µg/L — VIENNA CORRECTIONAL CENTER · 501 people · 2019 | 2/3 | SYR4 |
| Dichloroacetic Acid | 13 µg/L No EPA limit set Main supplier: VIENNA · 1,618 people · 2019
Highest in the city: 41.95 µg/L — VIENNA CORRECTIONAL CENTER · 501 people · 2019 | 2/3 | SYR4 |
| Barium | 31.64 µg/L 1.6% of the EPA limit 2000 µg/L Main supplier: VIENNA · 1,618 people · 2019
Highest in the city: 35.8 µg/L — VIENNA CORRECTIONAL CENTER · 501 people · 2019 | 2/3 | SYR4 |
| Trichloroacetic Acid | 1.552 µg/L No EPA limit set Main supplier: VIENNA · 1,618 people · 2019
Highest in the city: 21.5 µg/L — VIENNA CORRECTIONAL CENTER · 501 people · 2019 | 2/3 | SYR4 |
| Monobromoacetic Acid | 4.41 µg/L No EPA limit set Main supplier: VIENNA · 1,618 people · 2019
Highest in the city: 9.362 µg/L — VIENNA CORRECTIONAL CENTER · 501 people · 2019 | 2/3 | SYR4 |
| Bromodichloromethane | 1.2524 µg/L No EPA limit set Main supplier: VIENNA · 1,618 people · 2019
Highest in the city: 5.989 µg/L — VIENNA CORRECTIONAL CENTER · 501 people · 2019 | 2/3 | SYR4 |
| Monochloroacetic Acid | 3.8575 µg/L No EPA limit set Main supplier: VIENNA · 1,618 people · 2019
Highest in the city: 5.5675 µg/L — VIENNA CORRECTIONAL CENTER · 501 people · 2019 | 2/3 | SYR4 |
| Lead | 5.17 µg/L 34% of the EPA limit 15 µg/L Main supplier: VIENNA · 1,618 people · 2019 | 2/3 | SYR4 |
| Dibromochloromethane | 4.28915 µg/L No EPA limit set Highest in the city: VIENNA CORRECTIONAL CENTER · 501 people · 2019 | 1/3 | SYR4 |
| Arsenic | 1.4094 µg/L 14% of the EPA limit 10 µg/L Main supplier: VIENNA · 1,618 people · 2019 | 1/3 | SYR4 |
| Combined Radium (-226 And -228) | 0.9150 pCi/L 18% of the EPA limit 5 pCi/L Main supplier: VIENNA · 1,618 people · 2015
Highest in the city: 1.29 pCi/L — VIENNA CORRECTIONAL CENTER · 501 people · 2014 | 2/3 | SYR4 |
| Atrazine | 0.7850 µg/L 26% of the EPA limit 3 µg/L Highest in the city: VIENNA CORRECTIONAL CENTER · 501 people · 2019 | 1/3 | SYR4 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: VIENNA · 1,618 people · 2025
Highest in the city: 0.0012 mg/L — VIENNA CORRECTIONAL CENTER · 501 people · 2023 | 3/3 | 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 Vienna
| Supplier | Population served |
|---|---|
| VIENNA | 1,618 |
| SHAWNEE CORRECTIONAL CENTER | 1,617 |
| VIENNA CORRECTIONAL CENTER | 501 |
Frequently asked questions about Vienna tap water
Is Vienna tap water safe to drink?
EPA testing detected 20 contaminants in the water serving Vienna. 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 Vienna?
3 public water suppliers report drinking-water monitoring for Vienna, Illinois to the EPA. Each is listed above with its population served.
What contaminants are in Vienna's water?
The contaminants EPA monitoring detected in Vienna include Fluoride, Chlorite, Nitrate, Copper, Nitrate-Nitrite. 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.