Is Rensselaer, MO tap water safe?
The short answer
2 of the 2 utilities serving Rensselaer have a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and CDC’s records: Hannibal PWS and Ralls County PWSD 1.
Hannibal PWS, which serves the most people here, has 2 results above the health goal. The worst: Lead at 5.3 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 Rensselaer’s ZIP codes, from EPA’s estimates.
- Open report
Hannibal PWS
Missouri · serves 17,108 people · about 290 in Rensselaer
2 results above the health goal. The worst: Lead at 5.3 ppb, above the health goal.
3 health-based violations since 2016
- Open report
Ralls County PWSD 1
Missouri · serves 7,662 people · under 100 in Rensselaer
1 result above the legal limit and 1 result above EPA’s new limit, which takes effect in 2029. The worst: Total trihalomethanes (TTHM) at 75.4 ppb, above the legal limit.
8 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 Hannibal PWS’s water, which serves the most people here. Another utility’s report names what handles its own results.
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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: Lead, Arsenic
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: Lead, Arsenic
Water testing near Rensselaer
The 3 labs Missouri certifies closest to Rensselaer, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
Associated Electric Cooperatives Inc. (AECI)
Clifton Hill, MO · about 66 miles
Certified for bacteria
Columbia Water and Light Department Power Plant
Columbia, MO · about 69 miles
Certified for bacteria
Engineering Surveys & Services
Columbia, MO · about 69 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 Rensselaer
Which ZIP codes are in Rensselaer: 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 Rensselaer
Towns nearby with a page of their own.
What to do next
- Read Hannibal PWS’s full reportEvery result with its dates, the violations, and the certification claim that handles each finding.Open the report
- Filters for LeadRanked by certification and what they cost over five years.The best water filters for lead, ranked
- On a private well?No utility tests a well. A certified lab test is the first step.How to test well water