Is Armstrong, IA tap water safe?
The short answer
Neither of the 2 utilities serving Armstrong has a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and Iowa’s records.
Armstrong Water Supply, which serves the most people here, has 2 results above the health goal. The worst: Arsenic at 4.0 ppb, above the health goal. Health goals are stricter than legal limits and are not enforced.
A town can be served by more than one utility, and some homes are on private wells. The name on your water bill tells you which is yours, and your ZIP code narrows it down. They are listed by how many people each serves in Armstrong’s ZIP codes, from EPA’s estimates.
- Open report
Armstrong Water Supply
Iowa · serves 918 people · under 100 in Armstrong
2 results above the health goal. The worst: Arsenic at 4.0 ppb, above the health goal.
No health-based violations since 2016
- Open report
Oak Shores
Iowa · serves 55 people · lists Armstrong among the places it serves
1 result above the health goal. The worst: Arsenic at 3.5 ppb, above the health goal.
No health-based violations since 2016
What handles it
Each of these is certified, on a certifier’s listing, for a result above a line in Armstrong Water Supply’s water, which serves the most people here. Another utility’s report names what handles its own results.
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Countertop reverse osmosis
- IAPMO listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 58NSF/ANSI 401checked Oct. 4, 2026
Certified for: Arsenic, Lead
Aquasana SmartFlow Reverse Osmosis (AQ-SFRO2)
Under-sink reverse osmosis
- WQA listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 58NSF/ANSI 401checked Oct. 9, 2026
Certified for: Arsenic, Lead
Brondell Capella RC250 Reverse Osmosis System
Under-sink reverse osmosis
- WQA listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 58NSF/ANSI 401checked Oct. 9, 2026
Certified for: Arsenic, Lead
Water testing near Armstrong
The 2 labs Iowa certifies closest to Armstrong, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
State Hygienic Laboratory - Lakeside
Milford, IA · about 36 miles
Certified for bacteria, nitrate, minerals and other inorganics
Foundation Analytical Laboratory
Cherokee, IA · about 72 miles
Certified for bacteria, nitrate, lead and copper, metals, minerals and other inorganics, organic chemicals, PFAS
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 IowaZIP codes in Armstrong
Which ZIP codes are in Armstrong: Census 2020 relationship files. Which utilities serve them, and how many people: EPA SDWIS and EPA’s service area map. Each utility’s results: EPA UCMR 5, EPA SDWIS, and EPA’s and the state’s compliance monitoring, as its report lists them. How they are measured: methodology. Certified labs: Iowa DNR, laboratories certified for drinking water; distances from the Census 2020 ZIP code tabulation area gazetteer.
Near Armstrong
Towns nearby with a page of their own.
What to do next
- Read Armstrong Water Supply’s full reportEvery result with its dates, the violations, and the certification claim that handles each finding.Open the report
- Filters for ArsenicRanked by certification and what they cost over five years.The best reverse osmosis systems, ranked
- On a private well?No utility tests a well. A certified lab test is the first step.How to test well water