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Waldorf

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
216 people
Connections
118
Water source
Groundwater
Based in
Waldorf, MN
County
Waseca
Owner
Local government
The ZIP code it serves

56091

The short answer

2 results are above the health goal. The worst: Lead, above the health goal. 4 health-based violations since 2016.

What handles it

What was found

Lead and copper: EPA SDWIS monitoring periods ending 1997 to 2024.

Copper: EPA’s file records a utility’s copper only when it exceeds the action level. The last here was 1.9 ppm, for the period ending Dec. 31, 2000. None since is on file, so it is not counted as a current finding.

Uranium, nitrate, haloacetic acids (HAA5) and total trihalomethanes (TTHM): Minnesota’s yearly summaries per water system, 2023 to 2025, with EPA’s 2012 to 2019 file for earlier years.

Fluoride, arsenic and chromium (total): EPA’s compliance monitoring file, samples taken from Feb. 1, 2012 to Dec. 9, 2019. Newer results are in the utility’s annual water quality report.

Above the health goal2

Lead

Comes from pipes, often your own

Above the health goal

2.0ppb

90th percentile, 2022 to 2024

In the latest period, 9 in 10 homes sampled were at or below 2.0 ppb, below EPA’s action level of 15 ppb. The action level drops to 10 ppb on Nov. 1, 2027. EPA’s health goal for lead is zero.

What handles it

Uranium

Comes from the source

Above the health goal

0.45ppb

Highest yearly average, 2023 to 2025

2025: not found

Averaged by year, the highest was 0.45 ppb, in 2024: below EPA’s legal limit of 30 ppb, but above its health goal of zero. In 2025, the latest year on file, it wasn’t found.

What handles it

Below EPA’s limits4

Fluoride

Forms or is added in treatment

Below EPA’s limits

1.1ppm

Highest yearly average, 2012 to 2019

2019 average: 1.0 ppm

Averaged by year, the highest was 1.1 ppm, in 2018, below EPA’s legal limit of 4.0 ppm. Its highest single sample was 2.3 ppm. In 2019, the latest year on file, its five samples averaged 1.0 ppm.

What handles it

Nitrate

Comes from the source

Below EPA’s limits

1.1ppm

Highest yearly average, 2023 to 2025

2025 average: 0.4 ppm

Averaged by year, the highest was 1.1 ppm, in 2024, below EPA’s legal limit of 10 ppm. In 2025, the latest year on file, it averaged 0.4 ppm. Earlier, from 2012 to 2019, EPA’s file shows a highest sample of 1.4 ppm, in 2018.

What handles it

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

Haloacetic acids (HAA5)

Forms or is added in treatment

Below EPA’s limits

1.2ppb

Highest yearly average, 2023

Averaged by year, the highest was 1.2 ppb, in 2023, below EPA’s legal limit of 60 ppb. That is the only 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

1.2ppb

Highest yearly average, 2023

Averaged by year, the highest was 1.2 ppb, in 2023, below EPA’s legal limit of 80 ppb. That is the only year on file.

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.
  • Arsenic
  • Chromium (total)

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

The best water filters for lead, ranked

Violations since 2016

Contaminant or ruleTypePeriodMeasuredStatus
Gross alpha radiation (excluding radon and uranium)The running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageApril 1, 2026 to June 30, 202613.9 PCI/LArchived
Gross alpha radiation (excluding radon and uranium)The running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageJan. 1, 2026 to March 31, 202615.2 PCI/LArchived
Gross alpha radiation (excluding radon and uranium)The running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageOct. 1, 2025 to Dec. 31, 202517.3 PCI/LArchived
Gross alpha radiation (excluding radon and uranium)The running average was above the legal limit.EPA: Maximum Contaminant Level Violation, AverageJuly 1, 2025 to Sept. 30, 202515.6 PCI/LArchived
Health-based violations only. Resolved and archived mean the utility returned to compliance or the state closed the record.

What this report can’t tell you

  • Everything else. Uranium, nitrate, haloacetic acids (HAA5) and total trihalomethanes (TTHM) results here are Minnesota’s own yearly summaries from 2023 on, with EPA’s national file for 2012 to 2019. Fluoride, arsenic and chromium (total) come from EPA’s file alone, which ends in 2019. Waldorf’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 Feb. 1, 2012 to Dec. 9, 2019.

Testing your own tap

Waldorf’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.

The 3 labs Minnesota certifies closest to the area Waldorf serves, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

  • UC Laboratory

    Janesville, MN · about 12 miles

    Certified for bacteria, nitrate, metals

    (507) 234-5835

  • Minnesota Valley Testing Laboratories, Inc.

    New Ulm, MN · about 47 miles

    Certified for bacteria, nitrate, lead and copper, metals

    (507) 354-8517

  • RMB Environmental Laboratories, Inc. - Burnsville

    Burnsville, MN · about 62 miles

    Certified for bacteria, nitrate

    (952) 456-8470

All 24 certified labs for Minnesota

Sources

PWSID MN1810003. Rebuilt from EPA data on Oct. 18, 2026.

Also in Waseca County

All Minnesota utilities

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