Skip to content
TapBuff
ZIP

Schaller Water Supply

What EPA’s and Iowa’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
729 people
Connections
376
Water source
Groundwater
Based in
Schaller, IA
County
Sac
Owner
Local government
The ZIP code it serves

51053

The short answer

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

What handles it

What was found

Lead and copper: EPA SDWIS monitoring periods ending 2002 to 2023.

Arsenic, fluoride, haloacetic acids (HAA5), nitrate, chromium (total) and total trihalomethanes (TTHM): Iowa’s own results, samples taken from May 14, 2020 to Aug. 25, 2026, with EPA’s 2012 to 2019 file for earlier years.

Uranium: EPA’s compliance monitoring file, samples taken from May 16, 2013 to May 16, 2013. Newer results are in the utility’s annual water quality report.

Above the health goal3

Arsenic

Comes from the source

Above the health goal

2.1ppb

Highest yearly average, 2022

Averaged by year, the highest was 2.1 ppb, in 2022: below EPA’s legal limit of 10 ppb, but above its health goal of zero. That is the only year on file. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 1.0 ppb, in 2013.

What handles it

  • NSF/ANSI 58 look for “Arsenic (Pentavalent)<=50 ppb Reduction”
  • NSF/ANSI 53 look for “Arsenic (Pentavalent)<=50 ppb Reduction”

Uranium

Comes from the source

Above the health goal

5.5ppb

Highest yearly average, 2013

Averaged by year, the highest was 5.5 ppb, in 2013: 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

Lead

Comes from pipes, often your own

Above the health goal

0.7ppb

90th percentile, 2021 to 2023

In the latest period, 9 in 10 homes sampled were at or below 0.7 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

Below EPA’s limits3

Fluoride

Forms or is added in treatment

Below EPA’s limits

0.73ppm

Highest yearly average, 2020 to 2025

2025 average: 0.44 ppm

Averaged by year, the highest was 0.73 ppm, in 2024, below EPA’s legal limit of 4.0 ppm. Its highest single sample was 0.87 ppm. In 2025, the latest year on file, its two samples averaged 0.44 ppm. Earlier, from 2012 to 2019, EPA’s file shows a highest yearly average of 0.7 ppm, in 2013.

What handles it

Haloacetic acids (HAA5)

Forms or is added in treatment

Below EPA’s limits

5.6ppb

Highest yearly average, 2020 to 2026

2026: not found

Averaged by year, the highest was 5.6 ppb, in 2025, below EPA’s legal limit of 60 ppb. In 2026, the latest year on file, it wasn’t found in its one sample.

What handles it

No certification claim covers this compound yet.

Nitrate

Comes from the source

Below EPA’s limits

0.33ppm

Highest sample; found in 7 of 9

2026 average: 0.23 ppm

The highest sample, in 2026, was 0.33 ppm, below EPA’s legal limit of 10 ppm. That was also the latest year on file, and its two samples averaged 0.23 ppm. Earlier, from 2012 to 2019, EPA’s file shows a highest sample of 0.07 ppm, in 2019.

What handles it

  • NSF/ANSI 58 look for “Nitrate/Nitrite Reduction”
  • NSF/ANSI 53 look for “Nitrate/Nitrite (30 ppm challenge)”
2 compounds tested and not foundBelow the reporting level in every sample. Not found is not the same as zero.
  • Chromium (total)
  • Total trihalomethanes (TTHM)

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 53

    Claims: Arsenic (Pentavalent)<=50 ppb Reduction, Lead Reduction

    For: Arsenic, Lead

    Other certifiers’ wording: Arsenic (III) (50 ppb influent level)

  • NSF/ANSI 58

    Claims: Arsenic (Pentavalent)<=50 ppb Reduction, Uranium, Lead Reduction

    For: Arsenic, Uranium, Lead

    Other certifiers’ wording: Arsenic (Pentavalent)<=300 ppb Reduction; Arsenic (V) (300 ppb influent level)

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 reverse osmosis systems, ranked

The best water filters for lead, ranked

Violations since 2016

Contaminant or ruleTypePeriodMeasuredStatus
NitriteA sample was above the legal limit, for a contaminant judged one sample at a time.EPA: Maximum Contaminant Level Violation, Single SampleApril 1, 2026 to June 30, 20261.6 MG/LArchived
Groundwater RuleRequired treatment for surface water or groundwater was not met.EPA: Treatment Technique (SWTR and GWR)Feb. 1, 2023 to Feb. 28, 2023—Resolved
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. Arsenic, fluoride, haloacetic acids (HAA5), nitrate, chromium (total) and total trihalomethanes (TTHM) results here are Iowa’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. Schaller Water Supply’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; Iowa’s results run from May 14, 2020 to Aug. 25, 2026; EPA’s compliance samples are from May 16, 2013 to May 16, 2013.

Testing your own tap

Schaller Water Supply’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 Iowa certifies.

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

  • Foundation Analytical Laboratory

    Cherokee, IA · about 22 miles

    Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, PFAS

    (712) 225-6989

  • Analytical & Consulting Services

    Sergeant Bluff, IA · about 53 miles

    Certified for bacteria, nitrate

    (712) 943-4888

  • Siouxland District Health Department

    Sioux City, IA · about 54 miles

    Certified for bacteria, nitrate, minerals and other inorganics

    (712) 234-3908

State Hygienic Laboratory at the University of Iowa: Through the Grants-to-Counties program, private well owners in participating counties can have their water tested for total coliform bacteria and nitrate. Start with the county sanitarian at your county health department. No cost in a participating county. The Grants-to-Counties Program, State Hygienic Lab at the University of Iowa.

All 36 certified labs for Iowa

Sources

PWSID IA8156028. Rebuilt from EPA data on Oct. 18, 2026.

Also in Sac County

All Iowa utilities

What to do next