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Tap water quality report

Marion Municipal Water Dept

EPA monitoring tested this supplier for 94 contaminants and detected 20. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

94
contaminants tested
20
detected
41,623
people served
10
health-based violations
Iowa rankingsLead in IowaPFAS in Iowa
Water source
Ground water
Ownership
Local government
Counties served
Linn

Compliance record

Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.

10
health-based violations
28
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2015-01-01 → 2015-03-31
MCL Health-based Resolved 2015-01-01 → 2015-03-31
MCL Health-based Resolved 2015-01-01 → 2015-03-31
MCL Health-based Resolved 2015-01-01 → 2015-03-31
MCL Health-based Resolved 2003-10-01 → 2003-10-31
MCL Health-based Resolved 2003-10-01 → 2003-10-31
MCL Health-based Resolved 2003-10-01 → 2003-10-31
MCL Health-based Resolved 2003-10-01 → 2003-10-31
MCL Health-based Resolved 2003-10-01 → 2003-10-31
MCL Health-based Resolved 1995-09-01 → 1995-09-30

Other contaminants detected

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.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Fluoride
1960 µg/L 49%
of the EPA limit 4000 µg/L
 96/96 SYR4 2012–2019
Copper
275 µg/L 21%
of the EPA limit 1300 µg/L
 90/90 SYR4 2012–2018
Lead
21.9 µg/L 146%
of the EPA limit, in the worst sample — 15 µg/L
 56/90 SYR4 2012–2018
Nitrate
1400 µg/L 14%
of the EPA limit 10000 µg/L
 32/64 SYR4 2012–2019
Combined Radium (-226 And -228)
5.6 pCi/L 112%
of the EPA limit, in the worst sample — 5 pCi/L
 16/16 SYR4 2012–2018
Lead
0.0083 mg/L 55%
of the EPA limit 0.0150 mg/L
 13/13 LCR 2024
Lithium
182 µg/L
No EPA limit set
 8/8 UCMR-5 2025
Nitrite
360 µg/L 36%
of the EPA limit 1000 µg/L
 5/23 SYR4 2012–2019
Dibromoacetic Acid
1.04 µg/L
No EPA limit set
 4/16 SYR4 2012–2019
Monochloroacetic Acid
2.08 µg/L
No EPA limit set
 4/16 SYR4 2012–2019
Trichloroacetic Acid
5.27 µg/L
No EPA limit set
 4/15 SYR4 2012–2019
Barium
81.7 µg/L 4.1%
of the EPA limit 2000 µg/L
 3/3 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
6.23 µg/L 10%
of the EPA limit 60 µg/L
 2/16 SYR4 2012–2019
Arsenic
1.1 µg/L 11%
of the EPA limit 10 µg/L
 1/3 SYR4 2012–2019
Bromodichloromethane
0.9900 µg/L
No EPA limit set
 1/16 SYR4 2012–2019
Chloroform
0.5900 µg/L
No EPA limit set
 1/16 SYR4 2012–2019
Dibromochloromethane
1.28 µg/L
No EPA limit set
 1/16 SYR4 2012–2019
Gross Beta Particle Activity
12 pCi/L
No EPA limit set
 1/1 SYR4 2015
Selenium
1.7 µg/L 3.4%
of the EPA limit 50 µg/L
 1/3 SYR4 2012–2019
TTHM
2.86 µg/L 3.6%
of the EPA limit 80 µg/L
 1/16 SYR4 2012–2019
74 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalAtrazineBenzeneBenzo(A)PyreneBeryllium, TotalBromoformChlorobenzeneCyanideCadmiumCarbon TetrachlorideChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDichloroacetic AcidDinosebDiquatEthylbenzeneGlyphosateHfpo-DaLassoMercuryMonobromoacetic AcidNetfosaaNfdhaNmefosaaPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
MARION MUNICIPAL WATER DEPT
Phone
319-743-6310
Email
asmith@cityofmarion.org

Frequently asked questions about Marion Municipal Water Dept

Is Marion Municipal Water Dept tap water safe to drink?

EPA monitoring detected 20 contaminants in Marion Municipal Water Dept's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.

What contaminants were detected in Marion Municipal Water Dept's water?

EPA monitoring detected Fluoride, Copper, Lead, Nitrate, Combined Radium (-226 And -228), and others. The full list with the level and data source for each is above.

How many people does Marion Municipal Water Dept serve?

Marion Municipal Water Dept reports serving 41,623 people in Iowa, per its EPA record.

Has Marion Municipal Water Dept had any water quality violations?

The EPA has 28 violations on file for Marion Municipal Water Dept, of which 10 are health-based (a contaminant limit or required treatment was breached) and 0 remain open. The rest are monitoring or reporting failures.

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.