Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	OR4100587
PWS Name	ONTARIO, CITY OF
PWS Type	Community water system
Owner Type	Local government
Primary Source	Surface water
Primacy Type	State
Is Wholesaler?	No
Population Served	14465
County Served	Malheur

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 of Treatment (SWTR-Filter)	Surface Water Treatment Rule	Surface Water Treatment Rule	901707613	Returned to Compliance	01-MAR-2023	31-MAR-2023	No
MR	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	Surface Water Treatment Rule	901707615	Returned to Compliance	01-MAR-2023	31-MAR-2023	No
MR	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	Surface Water Treatment Rule	901707614	Returned to Compliance	01-MAR-2023	31-MAR-2023	No
MR	Monitoring, Turbidity (Enhanced SWTR)	Interim and Long Term 1 Enhanced Surface Water Treatment Rule	Interim Enhanced Surface Water Treatment Rule	901707616	Returned to Compliance	01-MAR-2023	31-MAR-2023	No
MR	Monitoring, Turbidity (Enhanced SWTR)	Interim and Long Term 1 Enhanced Surface Water Treatment Rule	Interim Enhanced Surface Water Treatment Rule	901707617	Returned to Compliance	01-MAR-2023	31-MAR-2023	No
MR	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	Surface Water Treatment Rule	901707612	Returned to Compliance	01-MAR-2023	31-MAR-2023	No
MON	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	901707611	Returned to Compliance	01-JAN-2023	31-JAN-2023	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	901707578	Returned to Compliance	01-JUL-2015	30-SEP-2015	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	901707577	Returned to Compliance	01-JUL-2015	30-SEP-2015	No
MR	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	Surface Water Treatment Rule	901707571	Returned to Compliance	01-AUG-2014	31-AUG-2014	No
MR	Monitoring, Turbidity (Enhanced SWTR)	Interim and Long Term 1 Enhanced Surface Water Treatment Rule	Interim Enhanced Surface Water Treatment Rule	901707570	Returned to Compliance	01-AUG-2014	31-AUG-2014	No
MR	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	Surface Water Treatment Rule	901707572	Returned to Compliance	01-AUG-2014	31-AUG-2014	No
MR	Monitoring, Repeat Minor (TCR)	Total Coliform Rule	Coliform (TCR)	901707567	Returned to Compliance	01-JUL-2013	31-JUL-2013	No
MR	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	Surface Water Treatment Rule	901707563	Returned to Compliance	01-JAN-2012	31-JAN-2012	No
MR	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	Surface Water Treatment Rule	901707565	Returned to Compliance	01-JAN-2012	31-JAN-2012	No
MR	Monitoring, Turbidity (Enhanced SWTR)	Interim and Long Term 1 Enhanced Surface Water Treatment Rule	Interim Enhanced Surface Water Treatment Rule	901707564	Returned to Compliance	01-JAN-2012	31-JAN-2012	No
MR	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	Surface Water Treatment Rule	901707560	Returned to Compliance	01-NOV-2011	30-NOV-2011	No
MR	Monitoring, Turbidity (Enhanced SWTR)	Interim and Long Term 1 Enhanced Surface Water Treatment Rule	Interim Enhanced Surface Water Treatment Rule	901707559	Returned to Compliance	01-NOV-2011	30-NOV-2011	No
MR	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	Surface Water Treatment Rule	901707561	Returned to Compliance	01-NOV-2011	30-NOV-2011	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	TTHM	901707557	Returned to Compliance	01-JAN-2011	31-MAR-2011	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	901707558	Returned to Compliance	01-JAN-2011	31-MAR-2011	No
MR	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	Surface Water Treatment Rule	1707515	Returned to Compliance	01-MAR-2010	31-MAR-2010	No
MR	Monitoring, Turbidity (Enhanced SWTR)	Interim and Long Term 1 Enhanced Surface Water Treatment Rule	Interim Enhanced Surface Water Treatment Rule	1707516	Returned to Compliance	01-MAR-2010	31-MAR-2010	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	1707514	Returned to Compliance	01-MAR-2010	31-MAR-2010	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	TTHM	1707512	Returned to Compliance	01-JAN-2010	31-MAR-2010	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	1707513	Returned to Compliance	01-JAN-2010	31-MAR-2010	No
MR	Monitoring, Regular	Arsenic Rule	Arsenic	1707510	Returned to Compliance	01-JAN-2009	31-DEC-2009	No
MR	Monitoring, Regular	Nitrate Rule	Nitrate	1707511	Returned to Compliance	01-JAN-2009	31-DEC-2009	No
MR	Monitoring, Source Water (LT2)	Long Term 2 Enhanced Surface Water Treatment Rule	Long Term 2 Enhanced Surface Water Treatment Rule	#1	Returned to Compliance	01-JAN-2008	-	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Heptachlor epoxide	901707547	Returned to Compliance	01-JAN-2008	31-DEC-2010	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Heptachlor	901707546	Returned to Compliance	01-JAN-2008	31-DEC-2010	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	LASSO	901707545	Returned to Compliance	01-JAN-2008	31-DEC-2010	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Atrazine	901707544	Returned to Compliance	01-JAN-2008	31-DEC-2010	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Carbofuran	901707543	Returned to Compliance	01-JAN-2008	31-DEC-2010	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Hexachlorocyclopentadiene	901707542	Returned to Compliance	01-JAN-2008	31-DEC-2010	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Dinoseb	901707541	Returned to Compliance	01-JAN-2008	31-DEC-2010	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Picloram	901707540	Returned to Compliance	01-JAN-2008	31-DEC-2010	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Di(2-ethylhexyl) phthalate	901707539	Returned to Compliance	01-JAN-2008	31-DEC-2010	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Simazine	901707538	Returned to Compliance	01-JAN-2008	31-DEC-2010	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	OXAMYL	901707537	Returned to Compliance	01-JAN-2008	31-DEC-2010	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Di(2-ethylhexyl) adipate	901707536	Returned to Compliance	01-JAN-2008	31-DEC-2010	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Glyphosate	901707535	Returned to Compliance	01-JAN-2008	31-DEC-2010	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Endothall	901707534	Returned to Compliance	01-JAN-2008	31-DEC-2010	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Diquat	901707533	Returned to Compliance	01-JAN-2008	31-DEC-2010	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Dalapon	901707532	Returned to Compliance	01-JAN-2008	31-DEC-2010	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Toxaphene	901707531	Returned to Compliance	01-JAN-2008	31-DEC-2010	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Methoxychlor	901707530	Returned to Compliance	01-JAN-2008	31-DEC-2010	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	BHC-GAMMA	901707529	Returned to Compliance	01-JAN-2008	31-DEC-2010	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Endrin	901707528	Returned to Compliance	01-JAN-2008	31-DEC-2010	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	ETHYLENE DIBROMIDE	901707555	Returned to Compliance	01-JAN-2008	31-DEC-2010	No

1 - 50 of 101

Enforcement Actions

Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
521	901707614	SOX	State Compliance achieved	02-MAY-2023	State	-
521	901707612	SOX	State Compliance achieved	02-MAY-2023	State	-
521	901707613	SOX	State Compliance achieved	02-MAY-2023	State	-
521	901707617	SOX	State Compliance achieved	02-MAY-2023	State	-
521	901707616	SOX	State Compliance achieved	02-MAY-2023	State	-
521	901707615	SOX	State Compliance achieved	02-MAY-2023	State	-
520	901707611	SOX	State Compliance achieved	14-FEB-2023	State	-
515	901707578	SOX	State Compliance achieved	16-OCT-2015	State	-
515	901707577	SOX	State Compliance achieved	16-OCT-2015	State	-
514	901707571	SOX	State Compliance achieved	09-OCT-2014	State	-
514	901707570	SOX	State Compliance achieved	09-OCT-2014	State	-
514	901707572	SOX	State Compliance achieved	09-OCT-2014	State	-
513	901707567	SOX	State Compliance achieved	09-SEP-2013	State	-
504	901707563	SOX	State Compliance achieved	06-MAR-2012	State	-
506	901707565	SOX	State Compliance achieved	06-MAR-2012	State	-
505	901707564	SOX	State Compliance achieved	06-MAR-2012	State	-
503	901707561	SOX	State Compliance achieved	04-JAN-2012	State	-
502	901707560	SOX	State Compliance achieved	04-JAN-2012	State	-
501	901707559	SOX	State Compliance achieved	04-JAN-2012	State	-
499	901707557	SOX	State Compliance achieved	02-MAY-2011	State	-
500	901707558	SOX	State Compliance achieved	02-MAY-2011	State	-
509	901707550	SIA	State Violation/Reminder Notice	22-FEB-2011	State	-
509	901707551	SIA	State Violation/Reminder Notice	22-FEB-2011	State	-
509	901707552	SIA	State Violation/Reminder Notice	22-FEB-2011	State	-
509	901707553	SIA	State Violation/Reminder Notice	22-FEB-2011	State	-
509	901707554	SIA	State Violation/Reminder Notice	22-FEB-2011	State	-
509	901707555	SIA	State Violation/Reminder Notice	22-FEB-2011	State	-
509	901707556	SIA	State Violation/Reminder Notice	22-FEB-2011	State	-
509	901707549	SIA	State Violation/Reminder Notice	22-FEB-2011	State	-
509	901707548	SIA	State Violation/Reminder Notice	22-FEB-2011	State	-
509	901707547	SIA	State Violation/Reminder Notice	22-FEB-2011	State	-
509	901707546	SIA	State Violation/Reminder Notice	22-FEB-2011	State	-
509	901707545	SIA	State Violation/Reminder Notice	22-FEB-2011	State	-
509	901707544	SIA	State Violation/Reminder Notice	22-FEB-2011	State	-
509	901707543	SIA	State Violation/Reminder Notice	22-FEB-2011	State	-
509	901707542	SIA	State Violation/Reminder Notice	22-FEB-2011	State	-
509	901707541	SIA	State Violation/Reminder Notice	22-FEB-2011	State	-
509	901707540	SIA	State Violation/Reminder Notice	22-FEB-2011	State	-
509	901707539	SIA	State Violation/Reminder Notice	22-FEB-2011	State	-
509	901707538	SIA	State Violation/Reminder Notice	22-FEB-2011	State	-
509	901707537	SIA	State Violation/Reminder Notice	22-FEB-2011	State	-
509	901707536	SIA	State Violation/Reminder Notice	22-FEB-2011	State	-
509	901707535	SIA	State Violation/Reminder Notice	22-FEB-2011	State	-
509	901707534	SIA	State Violation/Reminder Notice	22-FEB-2011	State	-
509	901707533	SIA	State Violation/Reminder Notice	22-FEB-2011	State	-
509	901707532	SIA	State Violation/Reminder Notice	22-FEB-2011	State	-
509	901707531	SIA	State Violation/Reminder Notice	22-FEB-2011	State	-
509	901707530	SIA	State Violation/Reminder Notice	22-FEB-2011	State	-
509	901707528	SIA	State Violation/Reminder Notice	22-FEB-2011	State	-
509	901707529	SIA	State Violation/Reminder Notice	22-FEB-2011	State	-

1 - 50 of 99

All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
INFILTRATION COLLECTOR - PIT	18729	Yes	Infiltration Gallery	Ground water under the influence of surface water	Other	Inactive
WELL 17	24614	Yes	Well	Ground water under the influence of surface water	Permanent	Active
WELL 16	24097	Yes	Well	Ground water under the influence of surface water	Permanent	Active
WELL 15	24096	Yes	Well	Ground water under the influence of surface water	Permanent	Active
WELL 4	2235	Yes	Well	Ground water under the influence of surface water	Permanent	Active
WELL 14	21756	Yes	Well	Ground water under the influence of surface water	Permanent	Active
WELL 6	21755	Yes	Well	Ground water under the influence of surface water	Permanent	Active
SNAKE RIVER	11774	Yes	Intake	Surface water	Permanent	Active
INFILTRATION COLLECTOR - POND	18730	Yes	Infiltration Gallery	Ground water under the influence of surface water	Other	Inactive
CH FOR OLD PLANT	19317	No	Common Headers	-	-	Active
CH FOR WESTECH PLANT	25390	No	Common Headers	-	-	Active
Distribution System	7169	No	Distribution System/Zone	-	-	Active
EP FOR RIVER, WELLS	12226	No	Sampling Station	-	-	Active
TP FOR WESTECH PLANT	25389	No	Treatment Plant	-	-	Active
TP FOR OLD PLANT	305	No	Treatment Plant	-	-	Active

1 - 15 of 15

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
TP FOR WESTECH PLANT	25389	Coagulation	Particulate removal
TP FOR WESTECH PLANT	25389	Rapid Mix	Particulate removal
TP FOR WESTECH PLANT	25389	Flocculation	Particulate removal
TP FOR WESTECH PLANT	25389	Sedimentation	Particulate removal
TP FOR WESTECH PLANT	25389	Filtration, Rapid Sand	Particulate removal
TP FOR WESTECH PLANT	25389	Hypochlorination, Pre	Disinfection
TP FOR WESTECH PLANT	25389	Hypochlorination, Post	Disinfection
TP FOR WESTECH PLANT	25389	Permanganate	Iron removal
TP FOR WESTECH PLANT	25389	Innovative	Corrosion control
TP FOR OLD PLANT	305	Hypochlorination, Post	Disinfection
TP FOR OLD PLANT	305	Filtration, Rapid Sand	Particulate removal
TP FOR OLD PLANT	305	Rapid Mix	Particulate removal
TP FOR OLD PLANT	305	Coagulation	Particulate removal
TP FOR OLD PLANT	305	Flocculation	Particulate removal
TP FOR OLD PLANT	305	Sedimentation	Particulate removal
TP FOR OLD PLANT	305	Hypochlorination, Pre	Disinfection
TP FOR OLD PLANT	305	Permanganate	Iron removal
TP FOR OLD PLANT	305	Innovative	Corrosion control

1 - 18 of 18

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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