What was found in Marion'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 | 1089.1 µg/L 27% of the EPA limit 4000 µg/L Highest in the city: LAKE OF EGYPT PWD · 11,368 people · 2019 | 2/8 | SYR4 |
| Chlorite | 880 µg/L 88% of the EPA limit 1000 µg/L Highest in the city: LAKE OF EGYPT PWD · 11,368 people · 2019 | 1/8 | SYR4 |
| Nitrate | 457 µg/L 4.6% of the EPA limit 10000 µg/L Highest in the city: FCI-MARION · 1,544 people · 2019 | 2/8 | SYR4 |
| Nitrate-Nitrite | 440.2 µg/L 4.4% of the EPA limit 10000 µg/L Highest in the city: FCI-MARION · 1,544 people · 2019 | 2/8 | SYR4 |
| Copper | 55.69999999999999 µg/L 4.3% of the EPA limit 1300 µg/L Main supplier: MARION · 16,855 people · 2017
Highest in the city: 187.99999999999994 µg/L — CRAB ORCHARD REFUGE · 25 people · 2019 | 6/8 | SYR4 |
| TTHM | 51.63949999999999 µg/L 65% of the EPA limit 80 µg/L Main supplier: MARION · 16,855 people · 2019
Highest in the city: 76.86 µg/L — FCI-MARION · 1,544 people · 2019 | 7/8 | SYR4 |
| Total Haloacetic Acids (HAA5) | 40.66999999999999 µg/L 68% of the EPA limit 60 µg/L Main supplier: MARION · 16,855 people · 2019
Highest in the city: 47.80999999999999 µg/L — LAKE OF EGYPT PWD · 11,368 people · 2019 | 7/8 | SYR4 |
| Chloroform | 40.33 µg/L No EPA limit set Main supplier: MARION · 16,855 people · 2019
Highest in the city: 46.90499999999999 µg/L — COAL VALLEY PWD · 4,023 people · 2019 | 7/8 | SYR4 |
| Lead | 4.829999999999999 µg/L 32% of the EPA limit 15 µg/L Main supplier: MARION · 16,855 people · 2017
Highest in the city: 33.639999999999986 µg/L — HIGHWAY 37 NORTH PWD · 1,065 people · 2019 | 6/8 | SYR4 |
| Barium | 28.599999999999998 µg/L 1.4% of the EPA limit 2000 µg/L Highest in the city: LAKE OF EGYPT PWD · 11,368 people · 2019 | 2/8 | SYR4 |
| Monobromoacetic Acid | 28.32999999999999 µg/L No EPA limit set Main supplier: MARION · 16,855 people · 2019 | 6/8 | SYR4 |
| Dichloroacetic Acid | 24.6 µg/L No EPA limit set Main supplier: MARION · 16,855 people · 2019
Highest in the city: 28.145 µg/L — LAKE OF EGYPT PWD · 11,368 people · 2019 | 7/8 | SYR4 |
| Bromodichloromethane | 10.0406 µg/L No EPA limit set Main supplier: MARION · 16,855 people · 2019
Highest in the city: 19.964999999999996 µg/L — FCI-MARION · 1,544 people · 2019 | 7/8 | SYR4 |
| Trichloroacetic Acid | 6.25 µg/L No EPA limit set Main supplier: MARION · 16,855 people · 2019
Highest in the city: 16.74 µg/L — LAKE OF EGYPT PWD · 11,368 people · 2019 | 7/8 | SYR4 |
| Dibromochloromethane | 4.217 µg/L No EPA limit set Main supplier: MARION · 16,855 people · 2019
Highest in the city: 11.76 µg/L — FCI-MARION · 1,544 people · 2019 | 7/8 | SYR4 |
| Monochloroacetic Acid | 4.3 µg/L No EPA limit set Main supplier: MARION · 16,855 people · 2019
Highest in the city: 5.190499999999999 µg/L — LAKE OF EGYPT PWD · 11,368 people · 2019 | 6/8 | SYR4 |
| Bromoform | 2.284 µg/L No EPA limit set Main supplier: MARION · 16,855 people · 2019
Highest in the city: 4.839999999999998 µg/L — FCI-MARION · 1,544 people · 2019 | 6/8 | SYR4 |
| Dibromoacetic Acid | 2.44 µg/L No EPA limit set Main supplier: MARION · 16,855 people · 2019
Highest in the city: 3.06 µg/L — FCI-MARION · 1,544 people · 2019 | 6/8 | SYR4 |
| Xylenes, Total | 0.9086 µg/L 0% of the EPA limit 10000 µg/L Highest in the city: FCI-MARION · 1,544 people · 2019 | 1/8 | SYR4 |
| Arsenic | 0.6400 µg/L 6.4% of the EPA limit 10 µg/L Highest in the city: FCI-MARION · 1,544 people · 2017 | 1/8 | SYR4 |
| Pfba | 0.0056 µg/L No EPA limit set Main supplier: MARION · 16,855 people · 2024 | 1/8 | UCMR-5 |
| Lead | 0.0012 mg/L 8% of the EPA limit 0.0150 mg/L Main supplier: MARION · 16,855 people · 2027
Highest in the city: 0.0022 mg/L — CRAB ORCHARD REFUGE · 25 people · 2025 | 8/8 | 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 Marion
| Supplier | Population served |
|---|---|
| MARION | 16,855 |
| LAKE OF EGYPT PWD | 11,368 |
| COAL VALLEY PWD | 4,023 |
| FCI-MARION | 1,544 |
| FERGES WATER DISTRICT | 1,185 |
| HIGHWAY 37 NORTH PWD | 1,065 |
| MARION MOBILE HOME VILLAGE | 170 |
| CRAB ORCHARD REFUGE | 25 |
Frequently asked questions about Marion tap water
Is Marion tap water safe to drink?
EPA testing detected 22 contaminants in the water serving Marion. 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 Marion?
8 public water suppliers report drinking-water monitoring for Marion, Illinois to the EPA. Each is listed above with its population served.
What contaminants are in Marion's water?
The contaminants EPA monitoring detected in Marion include Fluoride, Chlorite, Nitrate, Nitrate-Nitrite, 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.