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Public Water System
ROCK CITY
PWSID IL1770500 · Illinois · 313 people served
A
ExcellentROCK CITY is an EPA-regulated public water system in Illinois (PWSID IL1770500). It serves an estimated 313 residents — a rural community of customers — across 1 community across 1 ZIP code.
ROCK CITY has maintained full EPA Safe Drinking Water Act compliance over the most recent five-year reporting window. No health-based Maximum Contaminant Level (MCL) exceedances are on record. The grade of A reflects this clean compliance history.
Service Area
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Centered on the averaged ZIP-code centroid of 1 ZIP served.
Population
313
Cities
1
ZIPs
1
Violations
0
EPA Health-Based Violations
Health-based Maximum Contaminant Level (MCL) violations on file for ROCK CITY over the past five years of EPA SDWIS reporting.
✅
No health-based violations in the last 5 years.
ROCK CITY's water systems have met EPA health-based Maximum Contaminant Level (MCL) requirements throughout the EPA reporting window. This does not mean zero detection of regulated contaminants — it means all measured concentrations remained below their federal action levels.
Cities Served by ROCK CITY
ZIP Codes Served
About this system
EPA records this system as PWSID IL1770500. Data reflects the most recent EPA SDWIS publication as of 2026-05-18. Public Water System Identifiers (PWSIDs) are assigned by the EPA's Safe Drinking Water Act program to track every regulated water utility in the United States. The first two letters typically indicate the state primacy agency. For real-time water quality information, contact ROCK CITY directly or review their annual Consumer Confidence Report (CCR).
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