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Strandquist

What EPA’s and Minnesota’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
63 people
Connections
37
Water source
Groundwater
Based in
Strandquist, MN
County
Marshall
Owner
Local government
The ZIP code it serves

56758

The short answer

1 result is above EPA’s legal limit. The worst: Copper, above the action level. 1 health-based violation since 2016.

What handles it

What was found

Lead and copper: EPA SDWIS monitoring periods ending 2020 to 2021.

Haloacetic acids (HAA5), total trihalomethanes (TTHM) and nitrate: Minnesota’s yearly summaries per water system, 2023 to 2025.

Fluoride: EPA’s compliance monitoring file, samples taken from Jan. 10, 2012 to Sept. 11, 2019. Newer results are in the utility’s annual water quality report.

Above the legal limit1

Copper

Comes from pipes, often your own

Above the action level

2.4ppm

90th percentile, 2021

In the latest period, 9 in 10 homes sampled were at or below 2.4 ppm, above EPA’s action level of 1.3 ppm.

What handles it

Below EPA’s limits3

Fluoride

Forms or is added in treatment

Below EPA’s limits

3.6ppm

Highest yearly average, 2012 to 2019

2019 average: 3.5 ppm

Averaged by year, the highest was 3.6 ppm, in 2014, below EPA’s legal limit of 4.0 ppm. Its highest single sample was 3.8 ppm. In 2019, the latest year on file, its four samples averaged 3.5 ppm.

What handles it

Haloacetic acids (HAA5)

Forms or is added in treatment

Below EPA’s limits

1.0ppb

Highest yearly average, 2023 to 2025

Averaged by year, the highest was 1.0 ppb, in 2025, below EPA’s legal limit of 60 ppb. That was also the latest year on file.

What handles it

No certification claim covers this compound yet.

Total trihalomethanes (TTHM)

Forms or is added in treatment

Below EPA’s limits

0.5ppb

Highest yearly average, 2023 to 2025

2025: not found

Averaged by year, the highest was 0.5 ppb, in 2023, below EPA’s legal limit of 80 ppb. In 2025, the latest year on file, it wasn’t found.

What handles it

  • NSF/ANSI 53 look for “Trihalomethanes (TTHM) Reduction”
  • NSF/ANSI 58 look for “Trihalomethanes (TTHM) Reduction”
2 compounds tested and not foundBelow the reporting level in every sample. Not found is not the same as zero.
  • 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.”

At the tap, or for the whole house?

Lead and copper usually come from pipes and fixtures inside or near your home. A whole-house system sits where water enters, so it cannot catch what your own plumbing adds after it. For those, the filter that counts is the one at the tap. How whole-house systems compare.

Filters with those claims on a certifier’s listing

Disclosure: TapBuff earns a commission if you buy through some links on this page. It does not change which standard or filter we name. As an Amazon Associate, TapBuff earns from qualifying purchases. How TapBuff makes money

Compare five-year costs

Violations since 2016

Contaminant or ruleTypePeriodMeasuredStatus
Stage 1 Disinfectants and Disinfection Byproducts RuleTreatment was not run by a certified operator as required.EPA: Treatment Technique No Certif. OperatorJuly 1, 2022—Unaddressed
Health-based violations only. Resolved and archived mean the utility returned to compliance or the state closed the record. 5 monitoring or reporting violations not shown.

What this report can’t tell you

  • Everything else. Haloacetic acids (HAA5), total trihalomethanes (TTHM) and nitrate results here are Minnesota’s own yearly summaries from 2023 on, with EPA’s national file for 2012 to 2019. Fluoride comes from EPA’s file alone, which ends in 2019. Strandquist’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; Minnesota’s yearly summaries cover 2023 to 2025; EPA’s compliance samples are from Jan. 10, 2012 to Sept. 11, 2019.

Testing your own tap

Strandquist’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 Minnesota certifies.

No lab Minnesota certifies is within 75 miles of the area Strandquist serves on the state’s list. Some take samples by mail; the state’s page lists them all.

All 24 certified labs for Minnesota

Sources

PWSID MN1450010. Rebuilt from EPA data on Oct. 18, 2026.

Also in Marshall County

All Minnesota utilities

What to do next