Tap WaterIndex

← Iowa

Tap water quality report

Marion, IA

EPA monitoring detected 21 contaminants across the 5 water suppliers serving Marion. A detection doesn't automatically mean the water is unsafe — see the highest level found for each below, with its EPA source and period.

5
water suppliers
43,764
people served
21
contaminants found
Iowa rankings Lead in Iowa PFAS in Iowa

What was found in Marion's water

The highest level seen across the city's suppliers, the EPA limit for each, and where the figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Nitrate
2780 µg/L 28%
of the EPA limit 10000 µg/L
 2/5 SYR4
Fluoride
1960 µg/L 49%
of the EPA limit 4000 µg/L
 2/5 SYR4
Nitrite
360 µg/L 36%
of the EPA limit 1000 µg/L
 1/5 SYR4
Copper
300 µg/L 23%
of the EPA limit 1300 µg/L
 4/5 SYR4
Lithium
182 µg/L
No EPA limit set
 1/5 UCMR-5
Barium
140 µg/L 7%
of the EPA limit 2000 µg/L
 2/5 SYR4
Lead
21.9 µg/L 146%
of the EPA limit, in the worst sample — 15 µg/L
 4/5 SYR4
Gross Beta Particle Activity
12 pCi/L
No EPA limit set
 1/5 SYR4
Total Haloacetic Acids (HAA5)
9.19 µg/L 15%
of the EPA limit 60 µg/L
 2/5 SYR4
Combined Radium (-226 And -228)
5.6 pCi/L 112%
of the EPA limit, in the worst sample — 5 pCi/L
 1/5 SYR4
Trichloroacetic Acid
5.27 µg/L
No EPA limit set
 2/5 SYR4
Dichloroacetic Acid
4.26 µg/L
No EPA limit set
 1/5 SYR4
Monochloroacetic Acid
3.82 µg/L
No EPA limit set
 2/5 SYR4
TTHM
2.86 µg/L 3.6%
of the EPA limit 80 µg/L
 2/5 SYR4
Chloroform
2.47 µg/L
No EPA limit set
 2/5 SYR4
Selenium
1.7 µg/L 3.4%
of the EPA limit 50 µg/L
 1/5 SYR4
Dibromochloromethane
1.28 µg/L
No EPA limit set
 1/5 SYR4
Arsenic
1.1 µg/L 11%
of the EPA limit 10 µg/L
 1/5 SYR4
Dibromoacetic Acid
1.04 µg/L
No EPA limit set
 2/5 SYR4
Bromodichloromethane
0.9900 µg/L
No EPA limit set
 1/5 SYR4
Lead
0.0083 mg/L 55%
of the EPA limit 0.0150 mg/L
 5/5 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 single worst sample on record — 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
MARION MUNICIPAL WATER DEPT 41,623
EAGLE RIDGE 1,005
MARION VILLAGE 850
GLENBROOK COVE AREA 233
MEADOW KNOLLS ADDITION 53

Frequently asked questions about Marion tap water

Is Marion tap water safe to drink?

EPA testing detected 21 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?

5 public water suppliers report drinking-water monitoring for Marion, Iowa 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, Fluoride, Nitrite, Copper, Lithium. The full list, with the highest level found 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.