Summer Oaks Condo Assoc

Name: Summer Oaks Condo Assoc drinking water results
Creator: TapBuff
License: https://www.usa.gov/government-copyright

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: 70 people
Connections: 9
Water source: Groundwater
Based in: Merrimac, WI
County: Sauk
Owner: Private
Hardness: Very hard

The ZIP code it serves

53555

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

Fluoride, arsenic, chromium (total) and nitrate: Wisconsin’s own results, samples taken from Aug. 20, 2020 to June 24, 2024.

Uranium: EPA’s compliance monitoring file, samples taken from June 11, 2012 to June 11, 2012. Newer results are in the utility’s annual water quality report.

Above the health goal1

Uranium

Comes from the source

Above the health goal

0.04ppb

Highest yearly average, 2012

Averaged by year, the highest was 0.04 ppb, in 2012: 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

NSF/ANSI 58 look for “Uranium”

Below EPA’s limits1

Fluoride

Forms or is added in treatment

Below EPA’s limits

0.29ppm

Highest yearly average, 2021 to 2024

2024 average: 0.28 ppm

Averaged by year, the highest was 0.29 ppm, in 2021, below EPA’s legal limit of 4.0 ppm. In 2024, the latest year on file, its two samples averaged 0.28 ppm.

What handles it

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

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

Arsenic
Chromium (total)
Lead
Nitrate

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.”

NSF/ANSI 58
Claim: Uranium
For: Uranium

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, typically 279 mg/L (16.3 grains per gallon), across 2 sampling points, 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 16.3 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.

What this report can’t tell you

Everything else. Fluoride, arsenic, chromium (total) and nitrate results here are Wisconsin’s own from 2020 on, with EPA’s national file for 2012 to 2019. Uranium comes from EPA’s file alone, which ends in 2019. Summer Oaks Condo Assoc’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 Aug. 20, 2020 to June 24, 2024; EPA’s compliance samples are from June 11, 2012 to June 11, 2012.

Testing your own tap

Summer Oaks Condo Assoc’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 Summer Oaks Condo Assoc serves, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

CT Laboratories
Baraboo, WI · about 15 miles
Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, disinfection byproducts
(608) 356-2760
Public Health Madison & Dane County
Madison, WI · about 19 miles
Certified for bacteria
(608) 243-0357
Wisconsin State Laboratory of Hygiene
Madison, WI · about 19 miles
Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, disinfection byproducts, PFAS, radioactivity
(608) 224-6260

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