What was found in Frankfort'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 | 1745.5 µg/L 44% of the EPA limit 4000 µg/L Main supplier: FRANKFORT · 24,000 people · 2019
Highest in the city: 1891 µg/L — GATEWAY MHP · 884 people · 2018 | 2/2 | SYR4 |
| Copper | 937.05 µg/L 72% of the EPA limit 1300 µg/L Main supplier: FRANKFORT · 24,000 people · 2018 | 2/2 | SYR4 |
| Lead | 422.6 µg/L 2817% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: FRANKFORT · 24,000 people · 2018 | 2/2 | SYR4 |
| Nitrate | 174 µg/L 1.7% of the EPA limit 10000 µg/L Main supplier: FRANKFORT · 24,000 people · 2019 | 2/2 | SYR4 |
| Barium | 95.31 µg/L 4.8% of the EPA limit 2000 µg/L Main supplier: FRANKFORT · 24,000 people · 2019 | 2/2 | SYR4 |
| Lithium | 62.6 µg/L No EPA limit set Main supplier: FRANKFORT · 24,000 people · 2023 | 1/2 | UCMR-5 |
| Nitrate-Nitrite | 53 µg/L 0.5% of the EPA limit 10000 µg/L Main supplier: FRANKFORT · 24,000 people · 2016
Highest in the city: 54.95 µg/L — GATEWAY MHP · 884 people · 2016 | 2/2 | SYR4 |
| TTHM | 47.24 µg/L 59% of the EPA limit 80 µg/L Main supplier: FRANKFORT · 24,000 people · 2019 | 2/2 | SYR4 |
| Chloroform | 33.87 µg/L No EPA limit set Main supplier: FRANKFORT · 24,000 people · 2019 | 2/2 | SYR4 |
| Arsenic | 14.66 µg/L 147% of the EPA limit, at the 95th percentile of samples — 10 µg/L Main supplier: FRANKFORT · 24,000 people · 2019 | 2/2 | SYR4 |
| Bromodichloromethane | 13.14 µg/L No EPA limit set Main supplier: FRANKFORT · 24,000 people · 2019 | 2/2 | SYR4 |
| Chromium | 12.56 µg/L 13% of the EPA limit 100 µg/L Main supplier: FRANKFORT · 24,000 people · 2019 | 1/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 10.729 µg/L 18% of the EPA limit 60 µg/L Main supplier: FRANKFORT · 24,000 people · 2019 | 2/2 | SYR4 |
| Dibromochloromethane | 7.744 µg/L No EPA limit set Main supplier: FRANKFORT · 24,000 people · 2019 | 1/2 | SYR4 |
| Dichloroacetic Acid | 5.1115 µg/L No EPA limit set Main supplier: FRANKFORT · 24,000 people · 2019
Highest in the city: 7.5785 µg/L — GATEWAY MHP · 884 people · 2019 | 2/2 | SYR4 |
| Gross Alpha, Excl. Radon And U | 5.8005 pCi/L 39% of the EPA limit 15 pCi/L Main supplier: FRANKFORT · 24,000 people · 2013 | 1/2 | SYR4 |
| Trichloroacetic Acid | 4.892 µg/L No EPA limit set Main supplier: FRANKFORT · 24,000 people · 2019 | 2/2 | SYR4 |
| Combined Radium (-226 And -228) | 3.425 pCi/L 69% of the EPA limit 5 pCi/L Main supplier: FRANKFORT · 24,000 people · 2018
Highest in the city: 4.676 pCi/L — GATEWAY MHP · 884 people · 2018 | 2/2 | SYR4 |
| Monochloroacetic Acid | 4.672 µg/L No EPA limit set Main supplier: FRANKFORT · 24,000 people · 2019 | 2/2 | SYR4 |
| Bromoform | 3.165 µg/L No EPA limit set Main supplier: FRANKFORT · 24,000 people · 2019 | 1/2 | SYR4 |
| Xylenes, Total | 3.084 µg/L 0% of the EPA limit 10000 µg/L Main supplier: FRANKFORT · 24,000 people · 2019 | 1/2 | SYR4 |
| Monobromoacetic Acid | 1.28 µg/L No EPA limit set Main supplier: FRANKFORT · 24,000 people · 2019 | 1/2 | SYR4 |
| Dibromoacetic Acid | 1.0994 µg/L No EPA limit set Main supplier: FRANKFORT · 24,000 people · 2019 | 1/2 | SYR4 |
| Combined Uranium | 0.4523 µg/L 1.5% of the EPA limit 30 µg/L Main supplier: FRANKFORT · 24,000 people · 2013 | 1/2 | SYR4 |
| Pentachlorophenol | 0.2400 µg/L 24% of the EPA limit 1 µg/L Main supplier: FRANKFORT · 24,000 people · 2019 | 1/2 | SYR4 |
| Lead | 0.00098 mg/L 6.5% of the EPA limit 0.0150 mg/L Main supplier: FRANKFORT · 24,000 people · 2025 | 2/2 | 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 Frankfort
| Supplier | Population served |
|---|---|
| FRANKFORT | 24,000 |
| GATEWAY MHP | 884 |
Frequently asked questions about Frankfort tap water
Is Frankfort tap water safe to drink?
EPA testing detected 26 contaminants in the water serving Frankfort. 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 Frankfort?
2 public water suppliers report drinking-water monitoring for Frankfort, Illinois to the EPA. Each is listed above with its population served.
What contaminants are in Frankfort's water?
The contaminants EPA monitoring detected in Frankfort include Fluoride, Copper, Lead, Nitrate, Barium. 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.