Is Frankfort Square, IL tap water safe?
The short answer
Frankfort serves Frankfort Square. In EPA’s and Illinois’s records it has 3 results above the health goal and 1 result above EPA’s health benchmark, and no health-based violation since 2016.
The worst: Lithium at 62.6 ppb, above EPA’s health benchmark. Health goals are stricter than legal limits and are not enforced.
The water from Frankfort is very hard, typically 561 mg/L (32.8 grains per gallon). How Illinois’s water compares.
Some homes in a town are on private wells or a small system of their own. The name on your water bill tells you which is yours.
What handles it
Each of these is certified, on a certifier’s listing, for a result above a line in Frankfort’s water.
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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 Frankfort Square
The 3 labs Illinois certifies closest to Frankfort Square, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
Will County Health Department
Joliet, IL · about 11 miles
Certified for bacteria
ETP Labs, Inc.
Willowbrook, IL · about 19 miles
Certified for bacteria
Microbac Laboratories, Inc.
Merrillville, IN · about 26 miles
Certified for bacteria
Illinois Department of Public Health: Coliform bacteria and nitrate testing for private wells, with sample bottles from your local health department, or from the department's nearest regional office where there is none. You mail the sample to the lab, and results come back through the health department. Well Sampling for Coliform & Nitrate, Illinois Department of Public Health.
All 30 certified labs for IllinoisZIP codes in Frankfort Square
Which ZIP codes are in Frankfort Square: 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: Illinois Department of Public Health, certified water microbiology laboratories; distances from the Census 2020 ZIP code tabulation area gazetteer.
Near Frankfort Square
Other towns in Will County with a page of their own.
What to do next
- Read Frankfort’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