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Is Oak Brook, IL tap water safe?

3 utilities serve Oak Brook, by EPA’s records. Here is what EPA’s and Illinois’s records show for each, against the legal limits and the stricter health goals.

Matched to your utility using EPA records.

The short answer

None of the 3 utilities serving Oak Brook has a result above a legal limit or action level, or a health-based violation since 2016, in EPA’s and Illinois’s records.

Oak Brook, which serves the most people here, has 2 results above the health goal. The worst: Lead at 0.5 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 Oak Brook’s ZIP codes, from EPA’s estimates.

What handles it

Each of these is certified, on a certifier’s listing, for a result above a line in Oak Brook’s water, which serves the most people here. Another utility’s report names what handles its own results.

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Every claim, and more filters, in the full report

Water testing near Oak Brook

A utility tests the water it sends out. A test of your own tap shows what your pipes add, and on a private well it is the only test there is. It takes a lab Illinois certifies.

The 3 labs Illinois certifies closest to Oak Brook, in a straight line. Call first: certification is test by test, and not every lab takes samples from homeowners.

  • ETP Labs, Inc.

    Willowbrook, IL · about 7 miles

    Certified for bacteria

    (630) 891-3392

  • DuPage County Health Department

    Wheaton, IL · about 9 miles

    Certified for bacteria

    (630) 221-7177

  • Culligan Analytical Laboratory

    Rosemont, IL · about 10 miles

    Certified for bacteria

    (847) 430-1284

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 Illinois

ZIP codes in Oak Brook

Which ZIP codes are in Oak Brook: 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 Oak Brook

Other towns in DuPage County with a page of their own.

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