NAPERVILLE
PWSID: IL0434670 · Naperville, IL · Serves 156,406 people
According to EPA Safe Drinking Water Information System (SDWIS), NAPERVILLE (PWSID IL0434670) in Naperville, IL is listed as a CWS water system covering about 156,406 people. PlainEnviro's health-based extract shows zero health-based violation records for this system. PlainEnviro's extract shows zero health-based violation rows for NAPERVILLE; those counts stay historical EPA registry rows, not a current compliance or drinkability score.
NAPERVILLE has no health-based violation records in PlainEnviro's EPA SDWIS extract. This does not establish current safety or compliance.
PlainEnviro's health-based SDWIS extract covers monitoring and reporting violations only -- it does not include unresolved enforcement actions in progress or corrective steps a utility has taken since the extract date. No contaminant code appears in the extract. Day-to-day primacy enforcement for this system runs through the Illinois drinking-water program, not EPA directly.
A historical health-based record does not necessarily describe current water quality or compliance. The most authoritative current source is the utility's annual Consumer Confidence Report. For enforcement history and corrective-action orders, consult EPA ECHO and the Illinois state drinking-water program's public portal.
System Details
- EPA ID (PWSID)
- IL0434670
- System Type
- CWS
- Water Source
- Surface Water
- Location
- Naperville, IL
- Population Served
- 156,406
- Health Violations
- None
No Violations on Record
NAPERVILLE has no violations recorded in the EPA Safe Drinking Water Information System.
Frequently Asked Questions
What does EPA SDWIS list for NAPERVILLE?
How many people does NAPERVILLE serve?
Compare beyond Illinois
Nationwide peers by violations & population served
Cross-state SDWIS systems nearest NAPERVILLE on cumulative violation count (0) and EPA-reported population served (156,406). Population peers include ONSLOW WTR AND SEWER AUTHORITY, CITY OF MIDLAND WATER PURIFICATION PLANT, CITY OF ROSEVILLE.
Similar population served
Nearest cross-state systems by EPA SDWIS population_served (same 500+ gate).
Nearby Water Systems
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About This Data
NAPERVILLE (IL0434670) is drawn from EPA SDWIS. Nearby county systems in this extract include ROMEOVILLE; PLAINFIELD; NEW LENOX; FRANKFORT. Health-based rows (none listed) are historical registry state, not a current drinkability score.
Source: U.S. Environmental Protection Agency, SDWIS Federal Reporting Services
Read our methodology - how this data is sourced, computed, and verified.