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Rolling Hills MHP LLC

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
90 people
Connections
35
Water source
Groundwater
Based in
River Falls, WI
County
St. Croix
Owner
Private
Hardness
Very hard
The ZIP code it serves

54022

The short answer

1 result is above the health goal. The worst: Uranium, above the health goal. No health-based violations on file since 2016.

What handles it

What was found

Nitrate: Wisconsin’s own results, samples taken from Jan. 21, 2020 to Feb. 9, 2022.

Uranium, fluoride, arsenic and chromium (total): EPA’s compliance monitoring file, samples taken from June 12, 2018 to June 12, 2018. Newer results are in the utility’s annual water quality report.

Above the health goal1

Uranium

Comes from the source

Above the health goal

1.3ppb

Highest yearly average, 2018

Averaged by year, the highest was 1.3 ppb, in 2018: below EPA’s legal limit of 30 ppb, but above its health goal of zero. That is the only year on file.

What handles it

Below EPA’s limits2

Nitrate

Comes from the source

Below EPA’s limits

0.33ppm

Highest sample; found in 2 of 3

2022, one sample: 0.044 ppm

The highest sample, in 2020, was 0.33 ppm, below EPA’s legal limit of 10 ppm. In 2022, the latest year on file, its one sample was 0.044 ppm.

What handles it

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

Fluoride

Forms or is added in treatment

Below EPA’s limits

0.1ppm

Highest yearly average, 2018

Averaged by year, the highest was 0.1 ppm, in 2018, below EPA’s legal limit of 4.0 ppm. That is the only year on file.

What handles it

3 compounds tested and not foundBelow the reporting level in every sample. Not found is not the same as zero.
  • Arsenic
  • Chromium (total)
  • Lead

What handles it

A certification covers specific claims, not a whole standard. Look for these claims on the certifier’s listing, not the box. Wording varies a little: NSF writes “Lead Reduction,” WQA just “Lead.”

At the tap, or for the whole house?

These come with the water itself, so a whole-house system certified for the same claims treats every tap and shower. A filter at the tap treats drinking water for much less. How whole-house systems compare.

Filters with those claims on a certifier’s listing

None of the filters TapBuff has checked so far carry these claims. Search the certifier listings for the claim above.

Compare five-year costs

Hardness

Very hard, 190 mg/L (11.1 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 11.1 grains per gallon, salt includedSoftener or salt-free conditioner?Wisconsin water hardness, utility by utility

Violations since 2016

No health-based violations on file with EPA since 2016. There are 2 monitoring or reporting violations: a sample missed, late or not reported.

What this report can’t tell you

  • Everything else. Nitrate results here are Wisconsin’s own from 2020 on, with EPA’s national file for 2012 to 2019. Uranium, fluoride, arsenic and chromium (total) come from EPA’s file alone, which ends in 2019. Rolling Hills MHP LLC’s own annual report, which it must send you every year, has newer results for those and 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 Jan. 21, 2020 to Feb. 9, 2022; EPA’s compliance samples are from June 12, 2018 to June 12, 2018.

Testing your own tap

Rolling Hills MHP LLC’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 Rolling Hills MHP LLC serves, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

  • Quality Water Testing, Inc.

    Somerset, WI · about 21 miles

    Certified for bacteria, nitrate

    (715) 247-4873

  • Dunn County Health Department

    Menomonie, WI · about 33 miles

    Certified for bacteria, nitrate

    (715) 232-2388

  • Menomonie Waste Water

    Menomonie, WI · about 33 miles

    Certified for bacteria

    (715) 232-2175

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

Sources

PWSID WI6560143. Rebuilt from EPA data on Oct. 18, 2026.

Towns it serves

Also in St. Croix County

All Wisconsin utilities

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