Is Derby, KS tap water safe?
The short answer
Neither of the 2 utilities serving Derby 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 Derby, which serves the most people here, has 1 result above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 31.8 ppb, above EPA’s health benchmark. 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 Derby’s ZIP codes, from EPA’s estimates.
- Open report
City of Derby
Kansas · serves 25,413 people · about 4,600 in Derby
1 result above the health goal and 1 result above EPA’s health benchmark. The worst: Lithium at 31.8 ppb, above EPA’s health benchmark.
No health-based violations since 2016
- Open report
Sedgwick Co RWD 3
Kansas · serves 6,045 people · about 1,000 in Derby
1 result above EPA’s health benchmark. The worst: Lithium at 22.7 ppb, above EPA’s health benchmark. Hardness: hard, 140 mg/L (8.2 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 Derby’s water, which serves the most people here. Another utility’s report names what handles its own results.
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Brita Tahoe Pitcher with Elite Filter (OB60, OB06)
Pitcher
- WQA listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 401checked Oct. 13, 2026
- IAPMO listing:NSF/ANSI 53checked Oct. 13, 2026
Certified for: Lead
Brita Everyday Pitcher with Elite Filter (OB46, OB06)
Pitcher
- WQA listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 401checked Oct. 13, 2026
Certified for: Lead
PUR PLUS 11-Cup Pitcher (PPT111W)
Pitcher
- NSF listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 401checked Oct. 4, 2026
- WQA listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 401checked Oct. 4, 2026
- IAPMO listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 401checked Oct. 4, 2026
Certified for: Lead
Water testing near Derby
The lab Kansas certifies closest to Derby, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
Meridian Analytical Laboratory - Wichita
Wichita, KS · about 4 miles
Certified for bacteria, nitrate, minerals and other inorganics, organic chemicals, disinfection byproducts
ZIP codes in Derby
Which ZIP codes are in Derby: 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 Derby
Other towns in Sedgwick County with a page of their own.
What to do next
- Read City of Derby’s full reportEvery result with its dates, the violations, and the certification claim that handles each finding.Open the report
- About LithiumWhat it does to health, where it comes from, and the certification claim that addresses it.About Lithium
- On a private well?No utility tests a well. A certified lab test is the first step.How to test well water