Is Fredericktown, MO tap water safe?
The short answer
1 of the 2 utilities serving Fredericktown has a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and CDC’s records: Fredericktown PWS.
Madison County PWSD 1 North and South, which serves the most people here, has 2 results above the health goal. The worst: Arsenic at 1.1 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 Fredericktown’s ZIP codes, from EPA’s estimates.
- Open report
Madison County PWSD 1 North and South
Missouri · serves 1,705 people · under 100 in Fredericktown
2 results above the health goal. The worst: Arsenic at 1.1 ppb, above the health goal.
No health-based violations since 2016
- Open report
Fredericktown PWS
Missouri · serves 4,429 people · under 100 in Fredericktown
Nothing in its records is above a health goal.
18 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 Madison County PWSD 1 North and South’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 Fredericktown
The 3 labs Missouri certifies closest to Fredericktown, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
Environmental Analysis South
Jackson, MO · about 39 miles
Certified for bacteria
Eastern Missouri Water Lab
Lonedell, MO · about 58 miles
Certified for bacteria
Perfect Water Testing
Salem, MO · about 64 miles
Certified for bacteria
Missouri State Public Health Laboratory: Coliform and E. coli testing for private wells and other private drinking water sources, in kits from your local public health agency. A free state courier can carry the sample to the lab overnight. The handling fee is $10, by check or money order. Private Drinking Water Bacteriological Testing, Missouri Department of Health and Senior Services.
All 64 certified labs for MissouriZIP codes in Fredericktown
Which ZIP codes are in Fredericktown: 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: Missouri DNR, certified microbiological and chemical laboratories; distances from the Census 2020 ZIP code tabulation area gazetteer.
Near Fredericktown
Other towns in St. Francois County with a page of their own.
What to do next
- Read Madison County PWSD 1 North and South’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