Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	IL0434670
PWS Name	NAPERVILLE
PWS Type	Community water system
Owner Type	Local government
Primary Source	Surface water purchased
Primacy Type	State
Is Wholesaler?	No
Population Served	156406
County Served	DuPage

The tables below list all violations that the state reported to EPA for this water system. Health-based violations are listed first, followed by treatment technique, MRDL, monitoring, reporting, and other violations.

Health-based	Violations of maximum contaminant levels (MCLs) or maximum residual disinfectant levels (MRDLs), which specify the highest concentrations of contaminants or disinfectants, respectively, allowed in drinking water; or of treatment technique (TT) rules, which specify required processes intended to reduce the amounts of contaminants in drinking water. MCLs, MRDLs, and treatment technique rules are all health-based drinking water standards.
Maximum Contaminant Level or MCL	The highest level of a contaminant that is allowed in drinking water. MCLs are set as close to the MCLGs as feasible using the best available treatment technology.
Treatment Technique	A required process intended to reduce the level of a contaminant in drinking water.
Maximum residual disinfectant level or MRDL	The highest level of a disinfectant allowed in drinking water. There is convincing evidence that addition of a disinfectant is necessary for control of microbial contaminants.
Monitoring & reporting	Failure to conduct regular monitoring of drinking water quality, as required by SDWA, or to submit monitoring results in a timely fashion to the primacy agency or EPA.
Public notification & other	Failure to provide notification to the public as required by the Violations of Public Notification Rule and the Consumer Confidence Report Rule, and violations of other requirements such as those violations related to variances and exemptions.

Violations

Violation Category Code	Violation Type Description	Rule Name	Contaminant Name	Violation ID	Compliance Status Description	Compliance Period Begin Date	Compliance Period End Date	Is Health Based Ind
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	7023531	Returned to Compliance	01-APR-2023	30-JUN-2023	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Endrin	7023544	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Chlordane	7023548	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Benzo(a)pyrene	7023553	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	HEXACHLOROBENZENE	7023552	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Heptachlor epoxide	7023547	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Heptachlor	7023542	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	LASSO	7023551	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Atrazine	7023549	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Hexachlorocyclopentadiene	7023545	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Di(2-ethylhexyl) phthalate	7023554	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Simazine	7023543	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Di(2-ethylhexyl) adipate	7023556	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Toxaphene	7023550	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Methoxychlor	7023546	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	BHC-GAMMA	7023555	Known	01-JAN-2023	31-DEC-2025	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Gross Alpha, Excl. Radon and U	7023280	Known	30-JUN-1977	29-JUN-1981	No

1 - 17 of 17

Enforcement Actions

Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
7	7023531	SIF	State Public Notification received	06-JUN-2024	State	-

1 - 1 of 1

All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
CC 27-STRUCTURE 15A	32051	Yes	Consecutive Connection	Surface water	Permanent	Active
WELL 22 (21126) INACTIVE	20592	Yes	Well	Ground water	Other	Inactive
WELL 18 (21122) ABANDONED	20588	Yes	Well	Ground water	Other	Inactive
WELL 17 (21121) ABANDONED	20587	Yes	Well	Ground water	Other	Inactive
WELL 15 (21119) ABANDONED	20585	Yes	Well	Ground water	Other	Inactive
WELL 14 (21118) INACTIVE	20584	Yes	Well	Ground water	Other	Inactive
WELL 13 (21117) ABANDONED	20583	Yes	Well	Ground water	Other	Inactive
WELL 11 (21116) ABANDONED	20582	Yes	Well	Ground water	Other	Inactive
WELL 10 (21115) ABANDONED	20581	Yes	Well	Ground water	Other	Inactive
WELL 8 (21114) ABANDONED	20580	Yes	Well	Ground water	Other	Inactive
WELL 7 (21113) ABANDONED	20579	Yes	Well	Ground water	Other	Inactive
WELL 6 (21112) ABANDONED	20578	Yes	Well	Ground water	Other	Inactive
WELL 5 (21111) ABANDONED	20577	Yes	Well	Ground water	Other	Inactive
WELL 4 (21110) ABANDONED	20576	Yes	Well	Ground water	Other	Inactive
WELL 30 (00359) INACTIVE	18175	Yes	Well	Ground water	Other	Inactive
WELL 29 (00358) INACTIVE (TRANSFERRED)	18174	Yes	Well	Ground water	Other	Inactive
WELL 27 (00199) ABANDONED	18035	Yes	Well	Ground water	Other	Inactive
WELL 25 (00197) ABANDONED	18033	Yes	Well	Ground water	Other	Inactive
WELL 23 (00195) ABANDONED	18031	Yes	Well	Ground water	Other	Inactive
WELL 21 (21125) EMERGENCY	20591	Yes	Well	Ground water	Emergency	Active
WELL 20 (21124) EMERGENCY	20590	Yes	Well	Ground water	Emergency	Active
WELL 19 (21123) EMERGENCY	20589	Yes	Well	Ground water	Emergency	Active
WELL 16 (21120) EMERGENCY	20586	Yes	Well	Ground water	Emergency	Active
WELL 31 (00360) EMERGENCY	18176	Yes	Well	Ground water	Emergency	Active
WELL 28 (00200) EMERGENCY	18036	Yes	Well	Ground water	Emergency	Active
WELL 26 (00198) EMERGENCY	18034	Yes	Well	Ground water	Emergency	Active
WELL 24 (00196) EMERGENCY	18032	Yes	Well	Ground water	Emergency	Active
CC 28-STRUCTURE 15B	32052	Yes	Consecutive Connection	Surface water	Permanent	Active
CC 29-STRUCTURE 15C	32053	Yes	Consecutive Connection	Surface water	Permanent	Active
CC 30-STRUCTURE 15D	32054	Yes	Consecutive Connection	Surface water	Permanent	Active
CC 31-STRUCTURE 15E	32055	Yes	Consecutive Connection	Surface water	Permanent	Active
CC 32-STRUCTURE 15F	32056	Yes	Consecutive Connection	Surface water	Permanent	Active
CC 33-STRUCTURE 15G	32057	Yes	Consecutive Connection	Surface water	Permanent	Active
CC 41-STRUCTURE 15H	33156	Yes	Consecutive Connection	Surface water	Permanent	Active
NAPERVILLE	23606	No	Distribution System/Zone	-	-	Active
IDSE	34657	No	Distribution System/Zone	-	-	Active
SCHOOL LEAD SAMPLING	45915	No	Distribution System/Zone	-	-	Active
CHILDCARE FACILITY LEAD SAMPLING	45926	No	Distribution System/Zone	-	-	Active
GENERIC FINISHED SAMPLING STATION	27265	No	Sampling Station	-	-	Active
GENERIC RAW SAMPLING STATION	29687	No	Sampling Station	-	-	Active
750,000 GALLON ELEVATED STORAGE TANK	11105	No	Storage	-	-	Active
TWO 3.0 MG GROUND STORAGE TANKS	12144	No	Storage	-	-	Active
TWO 6.0 MG GROUND STORAGE TANKS	12745	No	Storage	-	-	Active
4.0 MG GROUND STORAGE TANK	12746	No	Storage	-	-	Active
3.3 MG & 2.3 MHG GROUND STORAGE TANKS	12748	No	Storage	-	-	Active
8.0 MG GROUND STORAGE TANK	40816	No	Storage	-	-	Active
2.0 MG STANDPIPE	40818	No	Storage	-	-	Active
2.5 MG GROUND STORAGE TANK	45979	No	Storage	-	-	Active
500,000 ELEVATED STORAGE TANK	45980	No	Storage	-	-	Active
750,000 GALLON ELEVATED STORAGE TANK	45981	No	Storage	-	-	Active

1 - 50 of 104

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
TP 06-WELL 10 (EMERGENCY)	15298	Gaseous Chlorination, Pre	Disinfection
TP 11-WELL 16 (EMERGENCY)	15303	Gaseous Chlorination, Pre	Disinfection
TP 14-WELL 19 (EMERGENCY)	15306	Gaseous Chlorination, Pre	Disinfection
TP 15-WELL 20 (EMERGENCY)	15307	Gaseous Chlorination, Pre	Disinfection
TP 16-WELL 21 (EMERGENCY)	15308	Gaseous Chlorination, Pre	Disinfection
TP 19-WELL 24 (EMERGENCY)	15311	Gaseous Chlorination, Pre	Disinfection
TP 20-WELL 25 (EMERGENCY)	15312	Gaseous Chlorination, Pre	Disinfection
TP 20-WELL 25 (EMERGENCY)	15312	Gaseous Chlorination, Pre	Iron removal
TP 20-WELL 25 (EMERGENCY)	15312	Sequestration	Iron removal
TP 21-WELL 26 (EMERGENCY)	15313	Gaseous Chlorination, Pre	Disinfection
TP 23-WELL 28 (EMERGENCY)	15315	Gaseous Chlorination, Pre	Disinfection
TP 23-WELL 28 (EMERGENCY)	15315	Gaseous Chlorination, Pre	Iron removal
TP 26-WELL 31 (EMERGENCY)	15318	Gaseous Chlorination, Pre	Disinfection
TP 34-SOUTH WATER WORKS	22821	Gaseous Chlorination, Pre	Disinfection
TP 35-LONGWOOD PUMP STA	22822	Gaseous Chlorination, Pre	Disinfection
TP 36-SOUTHEAST WATER WORKS	22823	Gaseous Chlorination, Pre	Disinfection
TP 37-SOUTHWEST WATER WORKS	22824	Gaseous Chlorination, Pre	Disinfection
TP 38-WEST WATER WORKS	22825	Gaseous Chlorination, Pre	Disinfection
TP 39-SOUTH WASHINGTON PUMP STA	22826	Gaseous Chlorination, Pre	Disinfection
TP 40-NORTHWEST WATER WORKS	22827	Gaseous Chlorination, Pre	Disinfection
TP 27-STRUCTURE 15A	26084	Gaseous Chlorination, Pre	Disinfection
TP 28-STRUCTURE 15B	26085	Gaseous Chlorination, Pre	Disinfection
TP 29-STRUCTURE 15C	26086	Hypochlorination, Post	Disinfection
TP 30-STRUCTURE 15D	26087	Gaseous Chlorination, Pre	Disinfection
TP 31-STRUCTURE 15E	26088	Hypochlorination, Post	Disinfection
TP 32-STRUCTURE 15F	26089	Gaseous Chlorination, Pre	Disinfection
TP 33-STRUCTURE 15G	26090	Gaseous Chlorination, Pre	Disinfection
TP 41-STRUCTURE 15H	33159	Hypochlorination, Post	Disinfection
TP42-WEST SOUTHWEST WATER WORKS	40817	Gaseous Chlorination, Post	Disinfection
TP43-NORTHEAST WATER WORKS	40819	Gaseous Chlorination, Post	Disinfection

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For more information on a Water System:
Ask the operators of your water system, contact your primacy agency or file a Freedom of Information Act (FOIA) request.
Drinking water in general: Find out more about your drinking water web site or call the Safe Drinking Water Hotline (1-800-426-4791). EPA has also prepared a table about various regulated drinking water contaminants.
Tools for accessing EPA drinking water data: Safe Drinking Water Information System (SDWIS) Federal Reporting Services and Drinking Water Performance and Results Report.
Research Data: As well as monitoring the levels of drinking water contaminants for which EPA has set standards, EPA, states, and water systems also carry out studies of contaminants that may need to be regulated in the future. For more information about these contaminants, please see the National Contaminant Occurrence Database.

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