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Tap water quality report

Marion, AR

EPA monitoring detected 17 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
13,742
people served
17
contaminants found
Arkansas rankings Lead in Arkansas PFAS in Arkansas

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-Nitrite
1390 µg/L 14%
of the EPA limit 10000 µg/L
Main supplier: MARION WATERWORKS · 13,032 people · 2019
1/2 SYR4
Fluoride
982 µg/L 25%
of the EPA limit 4000 µg/L
Main supplier: MARION WATERWORKS · 13,032 people · 2019
1/2 SYR4
Copper
498 µg/L 38%
of the EPA limit 1300 µg/L
Main supplier: MARION WATERWORKS · 13,032 people · 2017
2/2 SYR4
Lead
18.28 µg/L 122%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
Main supplier: MARION WATERWORKS · 13,032 people · 2018
2/2 SYR4
Lithium
12.8 µg/L
No EPA limit set
Main supplier: MARION WATERWORKS · 13,032 people · 2025
1/2 UCMR-5
TTHM
10.64 µg/L 13%
of the EPA limit 80 µg/L
Main supplier: MARION WATERWORKS · 13,032 people · 2019
2/2 SYR4
Chloroform
8.21 µg/L
No EPA limit set
Main supplier: MARION WATERWORKS · 13,032 people · 2019
2/2 SYR4
Total Haloacetic Acids (HAA5)
7.775 µg/L 13%
of the EPA limit 60 µg/L
Main supplier: MARION WATERWORKS · 13,032 people · 2019
2/2 SYR4
Monochloroacetic Acid
5.8 µg/L
No EPA limit set
Main supplier: MARION WATERWORKS · 13,032 people · 2019
1/2 SYR4
Dichloroacetic Acid
5.125 µg/L
No EPA limit set
Main supplier: MARION WATERWORKS · 13,032 people · 2019
2/2 SYR4
Dichloromethane
3.546 µg/L 71%
of the EPA limit 5 µg/L
Main supplier: MARION WATERWORKS · 13,032 people · 2019
1/2 SYR4
Trichloroacetic Acid
3.385 µg/L
No EPA limit set
Main supplier: MARION WATERWORKS · 13,032 people · 2019
2/2 SYR4
Bromodichloromethane
2.3 µg/L
No EPA limit set
Main supplier: MARION WATERWORKS · 13,032 people · 2019
2/2 SYR4
Di(2-ethylhexyl) Phthalate
1.95 µg/L 33%
of the EPA limit 6 µg/L
Main supplier: MARION WATERWORKS · 13,032 people · 2019
1/2 SYR4
Monobromoacetic Acid
1.79 µg/L
No EPA limit set
Main supplier: MARION WATERWORKS · 13,032 people · 2019
1/2 SYR4
Dibromochloromethane
0.5456 µg/L
No EPA limit set
Main supplier: MARION WATERWORKS · 13,032 people · 2019
1/2 SYR4
Lead
0.0010 mg/L 6.7%
of the EPA limit 0.0150 mg/L
Main supplier: MARION WATERWORKS · 13,032 people · 2025
Highest in the city: 0.0100 mg/L — SUNSET WATER ASSOCIATION · 710 people · 2003
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
MARION WATERWORKS 13,032
SUNSET WATER ASSOCIATION 710

Frequently asked questions about Marion tap water

Is Marion tap water safe to drink?

EPA testing detected 17 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, Arkansas 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-Nitrite, Fluoride, Copper, Lead, Lithium. 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.