Is Troy, IL tap water safe?
The short answer
1 of the 3 utilities serving Troy has a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and Illinois’s records: Troy.
Troy, which serves the most people here, has 1 result above the action level. The worst: Copper at 1.7 ppm, above the action level.
The water from Troy is very hard, typically 560 mg/L (32.8 grains per gallon). How Illinois’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 Troy’s ZIP codes, from EPA’s estimates.
- Open report
Troy
Illinois · serves 16,962 people · about 1,700 in Troy
1 result above the action level. The worst: Copper at 1.7 ppm, above the action level. Hardness: very hard, typically 560 mg/L (32.8 grains per gallon).
No health-based violations since 2016
- Open report
IL American - East St Louis
Illinois · serves 131,368 people · about 280 in Troy
2 results above the health goal. The worst: Lead at 2.0 ppb, above the health goal. Hardness: hard to very hard depending on the source, 124 to 205 mg/L (7.3 to 12 grains per gallon).
No health-based violations since 2016
- Open report
Maryville
Illinois · serves 10,150 people · about 140 in Troy
1 result above the health goal. The worst: Lead at 2.0 ppb, above the health goal. Hardness: hard to very hard depending on the source, 125 to 470 mg/L (7.3 to 27.5 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 Troy’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 Original Filter (OB60, OB03)
Pitcher
- WQA listing:NSF/ANSI 42NSF/ANSI 53checked Oct. 13, 2026
Certified for: Copper
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: Copper
Culligan 10-Cup Pitcher with ZeroWater Technology (ZEROP10)
Pitcher
- IAPMO listing:NSF/ANSI 42NSF/ANSI 53NSF/ANSI 401checked Oct. 9, 2026
Certified for: Copper
Water testing near Troy
The 3 labs Illinois certifies closest to Troy, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.
Teklab, Inc.
Collinsville, IL · about 6 miles
Certified for bacteria
Pace Analytical Services, LLC - Hazelwood
Hazelwood, MO · about 28 miles
Certified for bacteria
Precision Water Lab
Centralia, IL · about 41 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 Troy
Which ZIP codes are in Troy: 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 Troy
Other towns in Madison County with a page of their own.
What to do next
- Read Troy’s full reportEvery result with its dates, the violations, and the certification claim that handles each finding.Open the report
- About CopperWhat it does to health, where it comes from, and the certification claim that addresses it.About Copper
- On a private well?No utility tests a well. A certified lab test is the first step.How to test well water