Is Seneca, KS tap water safe?
The short answer
Neither of the 2 utilities serving Seneca has a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and Kansas’s records.
City of Seneca, which serves the most people here, has 2 results above the health goal. The worst: Lead at 3.6 ppb, above the health goal. Health goals are stricter than legal limits and are not enforced.
The water from City of Seneca is very hard, 350 mg/L (20.5 grains per gallon). How Kansas’s water compares.
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 Seneca’s ZIP codes, from EPA’s estimates.
- Open report
City of Seneca
Kansas · serves 2,130 people · under 100 in Seneca
2 results above the health goal. The worst: Lead at 3.6 ppb, above the health goal. Hardness: very hard, 350 mg/L (20.5 grains per gallon).
No health-based violations since 2016
- Open report
Nemaha Co RWD 3
Kansas · serves 2,800 people · under 100 in Seneca
2 results above the health goal. The worst: Lead at 1.1 ppb, above the health goal. Hardness: very hard, typically 295 mg/L (17.3 grains per gallon).
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 City of Seneca’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 Seneca
The lab Kansas certifies closest to Seneca, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
Irwin Army Community Hospital-Water Laboratory-PH-EH
Fort Riley, KS · about 66 miles
Certified for bacteria
ZIP codes in Seneca
Which ZIP codes are in Seneca: 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: Kansas Department of Health and Environment, drinking water labs, as listed in TNI LAMS; distances from the Census 2020 ZIP code tabulation area gazetteer.
Near Seneca
Towns nearby with a page of their own.
What to do next
- Read City of Seneca’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