Markham

Federal compliance record for an active community water system reporting 12,500 people served.

CURRENT EXPORTCurrent monitoring/reporting flagEPA's export includes a current monitoring or reporting violation flag.

Open EPA Detailed Facility Report ↗

01 / CURRENT FLAGS

What EPA flags—and what it does not

NOT FLAGGED
Health-based violationCurrent HEALTH_FLAG in the EPA export.
FLAGGED
Monitoring and reportingCurrent MR_FLAG in the EPA export.
NOT FLAGGED
Public notificationCurrent PN_FLAG in the EPA export.
FLAGGED
Other violationCurrent OTHER_FLAG in the EPA export.
NOT FLAGGED
Serious violatorCurrent serious-violator status in the EPA export.

Important limit

This page is not a household water test. A clear federal flag does not prove every home has safe water, and a flag is not a measurement at your faucet. Plumbing, service lines, local sampling, private wells, and newer events may not be reflected here.

02 / VIOLATION RECORD

Quarters with violations8rolling history field

Quarters with SNC0significant noncompliance

Rules in current violation2EPA export count

Rules in 3-year window4EPA export count

Current contaminant or rule entries

5200=LEAD AND COPPER RULE REVISIONS
7000=Consumer Confidence Rule

Entries in the three-year window

2950=TTHM
5200=LEAD AND COPPER RULE REVISIONS
7000=Consumer Confidence Rule

03 / OVERSIGHT & COVERAGE

Visits and sanitary surveys

Site visits, past 5 years: 3
Inspection visits: 0
Other visits: 3
Last sanitary survey: 03/26/2024
Last recorded visit: 08/12/2025
Significant deficiencies: 1

Places served in the export

State / territory: Illinois
Cities: MARKHAM
Counties: Cook
ZIP codes: Not supplied
Federal PWSID: IL0311770
Registry ID: 110013212772

04 / HOW TO USE THIS RECORD

A starting point—not the last word.

Confirm current conditions with the utility's latest Consumer Confidence Report, your state drinking-water program, and the EPA facility report. For household concerns, ask a qualified local laboratory about tap testing.

How the ledger is built →