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Tap water quality report

Marion, OH

EPA monitoring detected 24 contaminants across the 2 water suppliers serving Marion. 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.

2
water suppliers
47,902
people served
24
contaminants found
Ohio rankings Lead in Ohio PFAS in Ohio

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.

ContaminantLevel vs EPA limitSuppliersSource
Nitrate
6245 µg/L 62%
of the EPA limit 10000 µg/L
Main supplier: AQUA OHIO - MARION · 47,102 people · 2019
1/2 SYR4
Nitrate-Nitrite
6020 µg/L 60%
of the EPA limit 10000 µg/L
Main supplier: AQUA OHIO - MARION · 47,102 people · 2019
1/2 SYR4
Fluoride
1164.5 µg/L 29%
of the EPA limit 4000 µg/L
Main supplier: AQUA OHIO - MARION · 47,102 people · 2019
2/2 SYR4
Copper
66.6 µg/L 5.1%
of the EPA limit 1300 µg/L
Main supplier: AQUA OHIO - MARION · 47,102 people · 2017
Highest in the city: 291.5 µg/L — AQUA OHIO - LA RUE VILLAGE PWS · 800 people · 2019
2/2 SYR4
TTHM
102.825 µg/L 129%
of the EPA limit, at the 95th percentile of samples — 80 µg/L
Main supplier: AQUA OHIO - MARION · 47,102 people · 2019
2/2 SYR4
Chloroform
70.4 µg/L
No EPA limit set
Main supplier: AQUA OHIO - MARION · 47,102 people · 2019
2/2 SYR4
Total Haloacetic Acids (HAA5)
37.475 µg/L 62%
of the EPA limit 60 µg/L
Main supplier: AQUA OHIO - MARION · 47,102 people · 2019
2/2 SYR4
Lead
8.045 µg/L 54%
of the EPA limit 15 µg/L
Main supplier: AQUA OHIO - MARION · 47,102 people · 2019
Highest in the city: 33.2 µg/L — AQUA OHIO - LA RUE VILLAGE PWS · 800 people · 2019
2/2 SYR4
Dichloroacetic Acid
27 µg/L
No EPA limit set
Main supplier: AQUA OHIO - MARION · 47,102 people · 2019
2/2 SYR4
Lithium
19.4 µg/L
No EPA limit set
Main supplier: AQUA OHIO - MARION · 47,102 people · 2024
1/2 UCMR-5
Bromodichloromethane
18.41 µg/L
No EPA limit set
Main supplier: AQUA OHIO - MARION · 47,102 people · 2019
2/2 SYR4
Cyanide
13.4 µg/L 6.7%
of the EPA limit 200 µg/L
Main supplier: AQUA OHIO - MARION · 47,102 people · 2019
1/2 SYR4
Monochloroacetic Acid
13.035 µg/L
No EPA limit set
Main supplier: AQUA OHIO - MARION · 47,102 people · 2019
1/2 SYR4
Barium
11 µg/L 0.5%
of the EPA limit 2000 µg/L
Main supplier: AQUA OHIO - MARION · 47,102 people · 2019
1/2 SYR4
Trichloroacetic Acid
8.55 µg/L
No EPA limit set
Main supplier: AQUA OHIO - MARION · 47,102 people · 2019
2/2 SYR4
Dibromochloromethane
6.795 µg/L
No EPA limit set
Main supplier: AQUA OHIO - MARION · 47,102 people · 2019
2/2 SYR4
Monobromoacetic Acid
4.86 µg/L
No EPA limit set
Main supplier: AQUA OHIO - MARION · 47,102 people · 2019
1/2 SYR4
Atrazine
3.84 µg/L 128%
of the EPA limit, at the 95th percentile of samples — 3 µg/L
Main supplier: AQUA OHIO - MARION · 47,102 people · 2019
1/2 SYR4
Bromoform
1.25 µg/L
No EPA limit set
Main supplier: AQUA OHIO - MARION · 47,102 people · 2019
Highest in the city: 2.725 µg/L — AQUA OHIO - LA RUE VILLAGE PWS · 800 people · 2019
2/2 SYR4
Dibromoacetic Acid
1.905 µg/L
No EPA limit set
Main supplier: AQUA OHIO - MARION · 47,102 people · 2019
Highest in the city: 2.2 µg/L — AQUA OHIO - LA RUE VILLAGE PWS · 800 people · 2019
2/2 SYR4
Combined Radium (-226 And -228)
0.9480 pCi/L 19%
of the EPA limit 5 pCi/L
Main supplier: AQUA OHIO - MARION · 47,102 people · 2015
1/2 SYR4
Xylenes, Total
0.9220 µg/L 0%
of the EPA limit 10000 µg/L
Highest in the city: AQUA OHIO - LA RUE VILLAGE PWS · 800 people · 2018
1/2 SYR4
Simazine
0.3460 µg/L 8.6%
of the EPA limit 4 µg/L
Main supplier: AQUA OHIO - MARION · 47,102 people · 2019
1/2 SYR4
Lead
0.0037 mg/L 25%
of the EPA limit 0.0150 mg/L
Main supplier: AQUA OHIO - MARION · 47,102 people · 2023
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 Marion

SupplierPopulation served
AQUA OHIO - MARION 47,102
AQUA OHIO - LA RUE VILLAGE PWS 800

Frequently asked questions about Marion tap water

Is Marion tap water safe to drink?

EPA testing detected 24 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?

2 public water suppliers report drinking-water monitoring for Marion, Ohio 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 Nitrate, Nitrate-Nitrite, Fluoride, Copper, TTHM. 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.