Fox Marquette Mobile Home Park

What EPA’s and Wisconsin’s records show in this utility’s water: nitrate, arsenic and other regulated chemicals; lead and copper; and violations since 2016, with the certification that handles each result.

Serves: 72 people
Connections: 41
Water source: Groundwater
Based in: Montello, WI
County: Marquette
Owner: Private
Hardness: Very hard

The ZIP code it serves

53930

The short answer

Nothing in EPA’s and Wisconsin’s records for this utility is above a health goal. That covers nitrate, arsenic and other regulated chemicals, plus lead and copper, not everything. No health-based violations on file since 2016.

What was found

Nitrate, chromium (total), fluoride and arsenic: Wisconsin’s own results, samples taken from Sept. 13, 2021 to Sept. 24, 2024, with EPA’s 2012 to 2019 file for earlier years.

Below EPA’s limits3

Nitrate

Comes from the source

Below EPA’s limits

1.6ppm

One sample

2024, one sample: 1.6 ppm

The highest sample, in 2024, was 1.6 ppm, below EPA’s legal limit of 10 ppm. That is the only year on file, and its one sample was 1.6 ppm. Earlier, from 2012 to 2019, EPA’s file shows a highest sample of 1.3 ppm, in 2016.

What handles it

NSF/ANSI 58 look for “Nitrate/Nitrite Reduction”
NSF/ANSI 53 look for “Nitrate/Nitrite (30 ppm challenge)”

Chromium (total)

Comes from the source

Below EPA’s limits

2.4ppb

Highest yearly average, 2021 to 2024

2024, one sample: 1.8 ppb

Averaged by year, the highest was 2.4 ppb, in 2021, below EPA’s legal limit of 100 ppb. In 2024, the latest year on file, its one sample was 1.8 ppb. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 1.6 ppb, in 2015.

What handles it

NSF/ANSI 58 look for “Chromium (Hexavalent) Reduction”
NSF/ANSI 53 look for “Chromium Reduction”

Fluoride

Forms or is added in treatment

Below EPA’s limits

0.064ppm

Highest yearly average, 2021 to 2024

Averaged by year, the highest was 0.064 ppm, in 2024, below EPA’s legal limit of 4.0 ppm. That was also the latest year on file.

What handles it

NSF/ANSI 58 look for “Fluoride Reduction”
NSF/ANSI 53 look for “Fluoride”

2 compounds tested and not foundBelow the reporting level in every sample. Not found is not the same as zero.

Arsenic
Lead

Hardness

Very hard, 204 mg/L (11.9 grains per gallon), at its one sampling point, in 2018.

Hardness is calcium and magnesium. EPA sets no limit for it: it shows up as scale on fixtures and in water heaters, and as soap that won’t lather. USGS calls water above 60 mg/L moderately hard, above 120 hard and above 180 very hard.

Softeners compared at 11.9 grains per gallon, salt included Softener or salt-free conditioner?Wisconsin water hardness, utility by utility

Violations since 2016

No health-based violations on file with EPA since 2016. There is 1 monitoring or reporting violation: a sample missed, late or not reported.

What this report can’t tell you

Everything else. Nitrate, chromium (total), fluoride and arsenic results here are Wisconsin’s own from 2021 on, with EPA’s national file for 2012 to 2019. Fox Marquette Mobile Home Park’s own annual report, which it must send you every year, has the contaminants this page does not show.
Your own plumbing. Lead results are the 90th percentile across homes the utility samples. Your home’s service line, solder and fixtures decide yours. A certified lab test is the only way to know.
What it means for your health. This page reports what the records show and EPA’s limits and goals; it is not medical advice. If you are worried about a health effect, talk to a doctor or your local health department.
Anything after the latest data. SDWIS data is from 2026 Q3; UCMR 5 didn’t sample this utility; Wisconsin’s results run from Sept. 13, 2021 to Sept. 24, 2024.

Testing your own tap

Fox Marquette Mobile Home Park’s results are for the water it sends out. What your own service line, solder and fixtures add shows up only in a test of your tap, by a lab Wisconsin certifies.

The 3 labs Wisconsin certifies closest to the area Fox Marquette Mobile Home Park serves, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

Marquette Co. Health Dept. dba Rural Env. Health Alliance
Montello, WI · about 10 miles
Certified for bacteria, nitrate
(608) 297-3135
CT Laboratories
Baraboo, WI · about 18 miles
Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, disinfection byproducts
(608) 356-2760
SWD Labs, LLC
Randolph, WI · about 26 miles
Certified for bacteria, nitrate
(920) 326-5193

Wisconsin State Laboratory of Hygiene: Well water test kits ordered by phone and shipped free; you pay to mail the sample back, and the lab bills you after testing. Tests run from bacteria alone to a homeowner package covering bacteria, nitrate, fluoride, metals, hardness, volatile organic compounds and atrazine. Bacteria is $35, nitrate $35, lead $38, and the homeowner package $450, as of July 1, 2026. Public Environmental and Water Testing Prices, Wisconsin State Laboratory of Hygiene.

All 156 certified labs for Wisconsin