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Tap water quality report

Marquette Water Supply

EPA monitoring tested this supplier for 60 contaminants and detected 15. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

60
contaminants tested
15
detected
429
people served
37
health-based violations
Iowa rankingsLead in IowaPFAS in Iowa
Water source
Ground water
Ownership
Local government
Counties served
Clayton

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.

37
health-based violations
42
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2016-01-01 → 2016-03-31
MCL Health-based Resolved 2016-01-01 → 2016-03-31
MCL Health-based Resolved 2016-01-01 → 2016-03-31
MCL Health-based Resolved 2016-01-01 → 2016-03-31
MCL Health-based Resolved 2016-01-01 → 2016-03-31
MCL Health-based Resolved 2016-01-01 → 2016-03-31
MCL Health-based Resolved 2015-10-01 → 2015-12-31
MCL Health-based Resolved 2015-10-01 → 2015-12-31
MCL Health-based Resolved 2015-10-01 → 2015-12-31
MCL Health-based Resolved 2015-10-01 → 2015-12-31

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 95th percentile of this system's samples — over 100% is worth reading, but is not by itself a violation. Where a single sample came in higher than that percentile, it is noted under the bar. Formal violations are listed separately.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Copper
96.005 µg/L 7.4%
of the EPA limit 1300 µg/L
worst single sample: 152 µg/L
30/30 SYR4 2013–2019
Combined Radium (-226 And -228)
6.675 pCi/L 134%
of the EPA limit, at the 95th percentile of samples — 5 pCi/L
worst single sample: 8.9 pCi/L
22/24 SYR4 2012–2019
Lead
0.0074 mg/L 49%
of the EPA limit 0.0150 mg/L
 18/18 LCR 2024
Lead
18.82 µg/L 125%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
worst single sample: 40.8 µg/L
15/30 SYR4 2013–2019
Bromodichloromethane
3.391 µg/L
No EPA limit set
worst single sample: 3.58 µg/L
3/3 SYR4 2013–2019
Chloroform
17.222 µg/L
No EPA limit set
worst single sample: 19 µg/L
3/3 SYR4 2013–2019
Dibromochloromethane
1.542 µg/L
No EPA limit set
worst single sample: 1.56 µg/L
3/3 SYR4 2013–2019
TTHM
22.205 µg/L 28%
of the EPA limit 80 µg/L
worst single sample: 24 µg/L
3/3 SYR4 2013–2019
Barium
82.595 µg/L 4.1%
of the EPA limit 2000 µg/L
worst single sample: 84.1 µg/L
2/2 SYR4 2012–2015
Bromoform
1.8945 µg/L
No EPA limit set
worst single sample: 1.96 µg/L
2/3 SYR4 2013–2019
Dibromoacetic Acid
0.8135 µg/L
No EPA limit set
worst single sample: 0.8300 µg/L
2/3 SYR4 2013–2019
Fluoride
395 µg/L 9.9%
of the EPA limit 4000 µg/L
worst single sample: 400 µg/L
2/2 SYR4 2012–2015
Monochloroacetic Acid
8.5 µg/L
No EPA limit set
 1/3 SYR4 2013–2019
Total Haloacetic Acids (HAA5)
9.7 µg/L 16%
of the EPA limit 60 µg/L
 1/3 SYR4 2013–2019
Trichloroacetic Acid
0.5900 µg/L
No EPA limit set
 1/3 SYR4 2013–2019
45 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane2,4,5-TP2,4-DAntimony, TotalArsenicAtrazineBenzeneBenzo(A)PyreneChlorobenzeneCadmiumCarbon TetrachlorideChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDichloroacetic AcidDinosebDiquatEthylbenzeneGlyphosateLassoMercuryMonobromoacetic AcidNitratePentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
MARQUETTE WATER SUPPLY
Phone
563-873-3386
Email
[email protected]

Frequently asked questions about Marquette Water Supply

Is Marquette Water Supply tap water safe to drink?

EPA monitoring detected 15 contaminants in Marquette Water Supply'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 Marquette Water Supply's water?

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

How many people does Marquette Water Supply serve?

Marquette Water Supply reports serving 429 people in Iowa, per its EPA record.

Has Marquette Water Supply had any water quality violations?

The EPA has 42 violations on file for Marquette Water Supply, of which 37 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.