Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	OR4100218
PWS Name	CORNELIUS, CITY OF
PWS Type	Community water system
Owner Type	Local government
Primary Source	Surface water purchased
Primacy Type	State
Is Wholesaler?	No
Population Served	14490
County Served	Washington

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	Failure to Conduct Assessment Monitoring	Ground Water Rule	COLIPHAGE	902593935	Returned to Compliance	01-JAN-2024	31-DEC-2024	No
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	902593934	Returned to Compliance	01-JUL-2023	-	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	902593933	Returned to Compliance	01-JUL-2022	30-SEP-2022	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	902593932	Returned to Compliance	01-JUL-2022	30-SEP-2022	No
MR	Monitoring, Regular	Volatile Organic Chemicals	DICHLOROMETHANE	902593931	Returned to Compliance	01-JUL-2022	30-SEP-2022	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Gross Alpha, Excl. Radon and U	902593926	Returned to Compliance	01-APR-2020	30-JUN-2020	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	902593925	Returned to Compliance	01-APR-2020	30-JUN-2020	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Combined Uranium	902593924	Returned to Compliance	01-APR-2020	30-JUN-2020	No
MON	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	902593917	Returned to Compliance	01-MAY-2018	31-MAY-2018	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	902593913	Returned to Compliance	01-APR-2014	30-JUN-2014	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	902593914	Returned to Compliance	01-APR-2014	30-JUN-2014	No
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	902593912	Returned to Compliance	01-MAY-2013	31-MAY-2013	No
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	902593911	Returned to Compliance	01-SEP-2012	30-SEP-2012	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	2593709	Returned to Compliance	01-FEB-2009	28-FEB-2009	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	TTHM	2593508	Returned to Compliance	01-OCT-2007	31-DEC-2007	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	2593608	Returned to Compliance	01-OCT-2007	31-DEC-2007	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	2593007	Returned to Compliance	01-JUL-2007	31-JUL-2007	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	2593408	Returned to Compliance	01-JUL-2007	30-SEP-2007	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	TTHM	2593308	Returned to Compliance	01-JUL-2007	30-SEP-2007	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	TTHM	2592807	Returned to Compliance	01-APR-2007	30-JUN-2007	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	2592907	Returned to Compliance	01-APR-2007	30-JUN-2007	No
MR	Monitoring, Repeat Major (TCR)	Total Coliform Rule	Coliform (TCR)	2592707	Returned to Compliance	01-OCT-2006	31-OCT-2006	No
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	2592607	Returned to Compliance	01-SEP-2006	30-SEP-2006	No
MR	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	Lead and Copper Rule	2592405	Returned to Compliance	01-JAN-2005	-	No
Other	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	Consumer Confidence Rule	2592205	Returned to Compliance	19-OCT-2004	-	No
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	2592104	Returned to Compliance	01-JUL-2004	-	No
Other	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	Consumer Confidence Rule	2592004	Returned to Compliance	19-OCT-2003	-	No
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	2591903	Returned to Compliance	01-JUL-2003	-	No
MR	Monitoring, Repeat Minor (TCR)	Total Coliform Rule	Coliform (TCR)	2591802	Returned to Compliance	01-JUN-2002	30-JUN-2002	No
MR	Monitoring, Repeat Major (TCR)	Total Coliform Rule	Coliform (TCR)	14202	Returned to Compliance	01-NOV-2001	30-NOV-2001	No
Other	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	Consumer Confidence Rule	44501	Returned to Compliance	01-OCT-2000	-	No
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	579500	Returned to Compliance	01-JUL-2000	-	No
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	145299	Returned to Compliance	01-JAN-1999	31-JAN-1999	No
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	294398	Returned to Compliance	01-MAY-1998	31-MAY-1998	No
MR	Monitoring, Repeat Major (TCR)	Total Coliform Rule	Coliform (TCR)	541796	Returned to Compliance	01-SEP-1996	30-SEP-1996	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	230496	Returned to Compliance	01-MAR-1996	31-MAR-1996	No
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	2591792	Returned to Compliance	01-NOV-1992	30-NOV-1992	No
MR	Initial Tap Sampling for Pb and Cu	Lead and Copper Rule	Lead and Copper Rule	9900293	Returned to Compliance	01-JUL-1992	31-JAN-1993	No
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	1204091	Returned to Compliance	01-MAY-1991	31-MAY-1991	No

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Enforcement Actions

Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
741	902593935	SOX	State Compliance achieved	23-OCT-2025	State	-
740	902593934	SOX	State Compliance achieved	20-JUL-2023	State	-
738	902593931	SOX	State Compliance achieved	14-DEC-2022	State	-
739	902593933	SOX	State Compliance achieved	17-NOV-2022	State	-
739	902593932	SOX	State Compliance achieved	17-NOV-2022	State	-
736	902593925	SOX	State Compliance achieved	16-JUN-2021	State	-
737	902593926	SOX	State Compliance achieved	16-JUN-2021	State	-
736	902593924	SOX	State Compliance achieved	16-JUN-2021	State	-
734	902593917	SOX	State Compliance achieved	05-JUL-2018	State	-
733	902593914	SOX	State Compliance achieved	18-AUG-2014	State	-
733	902593913	SOX	State Compliance achieved	18-AUG-2014	State	-
732	902593912	SOX	State Compliance achieved	02-AUG-2013	State	-
730	902593911	SOX	State Compliance achieved	02-NOV-2012	State	-
719	2593709	SOX	State Compliance achieved	07-APR-2009	State	-
709	2592807	SOX	State Compliance achieved	17-DEC-2008	State	DBP snc 86760
709	2593608	SOX	State Compliance achieved	17-DEC-2008	State	DBP snc 86760
709	2593508	SOX	State Compliance achieved	17-DEC-2008	State	DBP snc 86760
709	2593408	SOX	State Compliance achieved	17-DEC-2008	State	DBP snc 86760
709	2593308	SOX	State Compliance achieved	17-DEC-2008	State	DBP snc 86760
709	2592907	SOX	State Compliance achieved	17-DEC-2008	State	DBP snc 86760
718	2593007	SOX	State Compliance achieved	05-SEP-2007	State	-
717	2592607	SOX	State Compliance achieved	09-NOV-2006	State	-
723	2592707	SOX	State Compliance achieved	09-NOV-2006	State	-
711	2592405	SOX	State Compliance achieved	22-SEP-2005	State	-
605	2592205	SOX	State Compliance achieved	02-DEC-2004	State	VALIDATED System Submitted CCR Cert for CY 2003 on 12/02/2004 - Migrated SOX 02/02/2005.
505	2592104	SOX	State Compliance achieved	02-DEC-2004	State	VALIDATED System Submitted CCR for CY 2003 on 12/02/2004 - Migrated SOX 02/02/2005.
304	2591903	SOX	State Compliance achieved	02-MAR-2004	State	VALIDATED System Submitted CCR for CY 2002 on 03/02/2004 - Migrated SOX 09/09/2004.
404	2592004	SOX	State Compliance achieved	02-MAR-2004	State	VALIDATED System Submitted CCR Cert for CY 2002 on 03/02/2004 - Migrated SOX 09/09/2004.
722	2591802	SOX	State Compliance achieved	04-SEP-2002	State	-
720	14202	SOX	State Compliance achieved	30-NOV-2001	State	-
201	579500	SOX	State Compliance achieved	15-AUG-2001	State	VALIDATED System Submitted CCR for CY 2000 on 08/15/2001 - Migrated SOX 08/30/2004.
101	44501	SOX	State Compliance achieved	15-AUG-2001	State	VALIDATED System Submitted CCR Cert for CY 2000 on 08/15/2001 - Migrated SOX 08/30/2004.
715	1204091	SOX	State Compliance achieved	24-JUL-2001	State	-
712	145299	SOX	State Compliance achieved	24-JUL-2001	State	-
713	230496	SOX	State Compliance achieved	24-JUL-2001	State	-
714	294398	SOX	State Compliance achieved	24-JUL-2001	State	-
721	541796	SOX	State Compliance achieved	24-JUL-2001	State	-
716	2591792	SOX	State Compliance achieved	24-JUL-2001	State	-
1E93	9900293	SOX	State Compliance achieved	31-JAN-1993	State	-

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All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
CITY OF HILLSBORO (01513)	22494	Yes	Consecutive Connection	Surface water	Permanent	Active
ASR WELL	25627	Yes	Well	Ground water	Seasonal	Active
COMMON HEADER FOR ASR WELL	25629	No	Common Headers	-	-	Active
Distribution System	6886	No	Distribution System/Zone	-	-	Active
EP FOR CITY OF HILLSBORO	22495	No	Sampling Station	-	-	Active
EP FOR ASR WELL	25628	No	Sampling Station	-	-	Active
TP FOR ASR WELL	25630	No	Treatment Plant	-	-	Active

1 - 7 of 7

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
TP FOR ASR WELL	25630	Innovative	Other

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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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