NAPERVILLE, IL · DuPage County
NAPERVILLE Water System
Current status
No open violations on record as of July 4, 2026.
This system's next federally required Consumer Confidence Report is due July 1, 2027, under the EPA's revised reporting rule.
Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed July 4, 2026. This is a record-keeping and public-information tool — it does not replace Illinois’s official records. Always confirm current status with Illinois before making decisions based on this information.
System facts
- System ID (PWSID)
- IL0434670
- System type
- Community Water System
- Population served
- 156,406
- Service connections
- 45,580
- Ownership
- local government
- Water source
- surface water (rivers, lakes, or reservoirs)
Violation history
Monitoring and Reporting (DBP)
—Total Haloacetic Acids (HAA5)
April 1, 2023 – June 30, 2023
ResolvedMonitoring, Regular
—Heptachlor
January 1, 2023 – December 31, 2025
ArchivedMonitoring, Regular
—Simazine
January 1, 2023 – December 31, 2025
ArchivedMonitoring, Regular
—Endrin
January 1, 2023 – December 31, 2025
ArchivedMonitoring, Regular
—Hexachlorocyclopentadiene
January 1, 2023 – December 31, 2025
ArchivedMonitoring, Regular
—Methoxychlor
January 1, 2023 – December 31, 2025
ArchivedMonitoring, Regular
—Heptachlor epoxide
January 1, 2023 – December 31, 2025
ArchivedMonitoring, Regular
—Chlordane
January 1, 2023 – December 31, 2025
ArchivedMonitoring, Regular
—Atrazine
January 1, 2023 – December 31, 2025
ArchivedMonitoring, Regular
—Toxaphene
January 1, 2023 – December 31, 2025
ArchivedMonitoring, Regular
—LASSO
January 1, 2023 – December 31, 2025
ArchivedMonitoring, Regular
—HEXACHLOROBENZENE
January 1, 2023 – December 31, 2025
ArchivedMonitoring, Regular
—Benzo(a)pyrene
January 1, 2023 – December 31, 2025
ArchivedMonitoring, Regular
—Di(2-ethylhexyl) phthalate
January 1, 2023 – December 31, 2025
ArchivedMonitoring, Regular
—BHC-GAMMA
January 1, 2023 – December 31, 2025
ArchivedMonitoring, Regular
—Di(2-ethylhexyl) adipate
January 1, 2023 – December 31, 2025
ArchivedMonitoring, Regular
—Gross Alpha, Excl. Radon and U
June 30, 1977 – June 29, 1981
Archived
Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| April 1, 2023 – June 30, 2023 | Monitoring and Reporting (DBP) | Total Haloacetic Acids (HAA5) | — | Resolved |
| January 1, 2023 – December 31, 2025 | Monitoring, Regular | Heptachlor | — | Archived |
| January 1, 2023 – December 31, 2025 | Monitoring, Regular | Simazine | — | Archived |
| January 1, 2023 – December 31, 2025 | Monitoring, Regular | Endrin | — | Archived |
| January 1, 2023 – December 31, 2025 | Monitoring, Regular | Hexachlorocyclopentadiene | — | Archived |
| January 1, 2023 – December 31, 2025 | Monitoring, Regular | Methoxychlor | — | Archived |
| January 1, 2023 – December 31, 2025 | Monitoring, Regular | Heptachlor epoxide | — | Archived |
| January 1, 2023 – December 31, 2025 | Monitoring, Regular | Chlordane | — | Archived |
| January 1, 2023 – December 31, 2025 | Monitoring, Regular | Atrazine | — | Archived |
| January 1, 2023 – December 31, 2025 | Monitoring, Regular | Toxaphene | — | Archived |
| January 1, 2023 – December 31, 2025 | Monitoring, Regular | LASSO | — | Archived |
| January 1, 2023 – December 31, 2025 | Monitoring, Regular | HEXACHLOROBENZENE | — | Archived |
| January 1, 2023 – December 31, 2025 | Monitoring, Regular | Benzo(a)pyrene | — | Archived |
| January 1, 2023 – December 31, 2025 | Monitoring, Regular | Di(2-ethylhexyl) phthalate | — | Archived |
| January 1, 2023 – December 31, 2025 | Monitoring, Regular | BHC-GAMMA | — | Archived |
| January 1, 2023 – December 31, 2025 | Monitoring, Regular | Di(2-ethylhexyl) adipate | — | Archived |
| June 30, 1977 – June 29, 1981 | Monitoring, Regular | Gross Alpha, Excl. Radon and U | — | Archived |
Resolved addressed and confirmed by the stateArchived closed in EPA's records (typically due to age or a data correction)
Enforcement actions
No enforcement actions on record for this system.
Contact
SLEVNIK, JOSEPH
630-420-6125
NAPERVILLE, IL 60564