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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.

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Violations

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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
RPT	Notification, Known or Potential LSL	Lead and Copper Rule Revisions	LEAD AND COPPER RULE REVISIONS	8743943	Open	02-JUL-2025	-	No
Other	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	Consumer Confidence Rule	8743938	Returned to Compliance	05-SEP-2024	-	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	CARBON, TOTAL	8743936	Returned to Compliance	01-APR-2022	30-JUN-2022	No
Other	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	Consumer Confidence Rule	8743934	Open	10-FEB-2020	-	No
Other	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	Consumer Confidence Rule	8743932	Open	02-NOV-2018	-	No
MON	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	8743931	Returned to Compliance	01-AUG-2018	31-AUG-2018	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	8743929	Returned to Compliance	01-OCT-2016	31-DEC-2016	No
TT	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Surface Water Treatment Rule	8743908	Returned to Compliance	01-OCT-2007	31-OCT-2007	Yes
MR	Monitoring, Regular	Synthetic Organic Chemicals	Simazine	8743806	Returned to Compliance	01-MAY-2006	31-MAY-2006	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Atrazine	8743606	Returned to Compliance	01-MAY-2006	31-MAY-2006	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	LASSO	8743706	Returned to Compliance	01-MAY-2006	31-MAY-2006	No
MR	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	Surface Water Treatment Rule	6657204	Returned to Compliance	01-OCT-2003	31-OCT-2003	No
TT	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Surface Water Treatment Rule	2226994	Returned to Compliance	01-FEB-1994	28-FEB-1994	Yes
MR	Monitoring of Treatment (SWTR-Filter)	Surface Water Treatment Rule	Surface Water Treatment Rule	2226794	Returned to Compliance	01-JAN-1994	31-JAN-1994	No
TT	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Surface Water Treatment Rule	2226894	Returned to Compliance	01-OCT-1993	31-OCT-1993	Yes
TT	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Surface Water Treatment Rule	2227293	Returned to Compliance	01-SEP-1993	30-SEP-1993	Yes
TT	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Surface Water Treatment Rule	2227193	Returned to Compliance	01-AUG-1993	31-AUG-1993	Yes
TT	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Surface Water Treatment Rule	2227093	Returned to Compliance	01-JUL-1993	31-JUL-1993	Yes

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Enforcement Actions

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Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
8062646	8743943	SIE	State Public Notification requested	21-OCT-2025	State	-
8062643	8743938	SOX	State Compliance achieved	10-FEB-2025	State	-
8062636	8743936	SIF	State Public Notification received	06-JUN-2023	State	-
8062629	8743934	SIA	State Violation/Reminder Notice	10-FEB-2020	State	-
8062628	8743931	SIF	State Public Notification received	23-MAY-2019	State	-
8062627	8743932	SIA	State Violation/Reminder Notice	02-NOV-2018	State	-
8062622	8743929	SIF	State Public Notification received	19-JUN-2017	State	-
8062308	6657204	SOX	State Compliance achieved	20-FEB-2008	State	-
8062308	2226794	SOX	State Compliance achieved	20-FEB-2008	State	-
8062208	2226994	SOX	State Compliance achieved	12-FEB-2008	State	-
8062208	2227293	SOX	State Compliance achieved	12-FEB-2008	State	-
8062208	2227193	SOX	State Compliance achieved	12-FEB-2008	State	-
8062208	2227093	SOX	State Compliance achieved	12-FEB-2008	State	-
8062208	2226894	SOX	State Compliance achieved	12-FEB-2008	State	-
8062408	8743908	SIF	State Public Notification received	21-DEC-2007	State	-
8062107	8743806	SIF	State Public Notification received	20-OCT-2006	State	-
8062107	8743706	SIF	State Public Notification received	20-OCT-2006	State	-
8062107	8743606	SIF	State Public Notification received	20-OCT-2006	State	-

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All Facilities

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Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
SELPH ROAD RESERVOIR	21638	Yes	Intake	Surface water	Permanent	Active
IN FROM HILLSBORO CITY CLEAR CREEK INTAK	21640	Yes	Intake	Surface water	Permanent	Active
LIBERTY PARK RESERVOIR	21639	Yes	Intake	Surface water	Permanent	Active
CLEARWELL 2	48476	No	Clear Well	-	-	Active
CLEARWELL	39100	No	Clear Well	-	-	Inactive
HILLSBORO, CITY OF DISTRIBUTION	25745	No	Distribution System/Zone	-	-	Active
HIGH SERVICE PUMPS	39094	No	Pump Facility	-	-	Active
CLEAR CREEK RAW PUMPING STATION	48477	No	Pump Facility	-	-	Active
Hillsboro, City Of P01	92261	No	Sampling Station	-	-	Inactive
OAK STREET TOWER	39096	No	Storage	-	-	Active
TOWER DRIVE	39098	No	Storage	-	-	Active
CLEARWELL 1	46282	No	Storage	-	-	Active
HILLSBORO WTP	4012	No	Treatment Plant	-	-	Active

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Treatment Processes

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Facility Name	Facility ID	Treatment Process	Treatment Objective
HILLSBORO WTP	4012	Permanganate	Disinfection by-products control
HILLSBORO WTP	4012	Filtration, Rapid Sand	Particulate removal
HILLSBORO WTP	4012	Gaseous Chlorination, Post	Disinfection
HILLSBORO WTP	4012	Coagulation	Particulate removal
HILLSBORO WTP	4012	Activated Carbon, Powdered	Taste / odor control
HILLSBORO WTP	4012	Inhibitor, Polyphosphate	Other
HILLSBORO WTP	4012	Flocculation	Particulate removal
HILLSBORO WTP	4012	Rapid Mix	Particulate removal
HILLSBORO WTP	4012	Sedimentation	Particulate removal
HILLSBORO WTP	4012	Fluoridation	Other

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