Safe Drinking Water Information System (SDWIS) Federal Reporting Services

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PWS ID	KS2010901
PWS Name	OAKLEY, CITY OF
PWS Type	Community water system
Owner Type	Local government
Primary Source	Ground water
Primacy Type	State
Is Wholesaler?	No
Population Served	2026
County Served	Logan

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
MCL	Maximum Contaminant Level Violation, Single Sample	Nitrate Rule	Nitrate	5299	Known	01-JUL-2025	30-SEP-2025	Yes
MCL	Maximum Contaminant Level Violation, Single Sample	Nitrate Rule	Nitrate	5298	Known	01-APR-2025	30-JUN-2025	Yes
MCL	Maximum Contaminant Level Violation, Single Sample	Nitrate Rule	Nitrate	5297	Known	01-JAN-2025	31-MAR-2025	Yes
MCL	Maximum Contaminant Level Violation, Single Sample	Nitrate Rule	Nitrate	5296	Known	01-JUL-2024	30-SEP-2024	Yes
MCL	Maximum Contaminant Level Violation, Single Sample	Nitrate Rule	Nitrate	5295	Known	01-APR-2024	30-JUN-2024	Yes
MCL	Maximum Contaminant Level Violation, Single Sample	Nitrate Rule	Nitrate	5292	Known	01-JUL-2023	30-SEP-2023	Yes
MCL	Maximum Contaminant Level Violation, Single Sample	Nitrate Rule	Nitrate	5291	Known	01-APR-2023	30-JUN-2023	Yes
MCL	Maximum Contaminant Level Violation, Single Sample	Nitrate Rule	Nitrate	5289	Returned to Compliance	01-OCT-2022	31-DEC-2022	Yes
MCL	Maximum Contaminant Level Violation, Single Sample	Nitrate Rule	Nitrate	5288	Known	01-JUL-2022	30-SEP-2022	Yes
MCL	Maximum Contaminant Level Violation, Single Sample	Nitrate Rule	Nitrate	5287	Known	01-APR-2022	30-JUN-2022	Yes
MCL	Maximum Contaminant Level Violation, Single Sample	Nitrate Rule	Nitrate	5284	Returned to Compliance	01-JUL-2021	30-SEP-2021	Yes
MCL	Maximum Contaminant Level Violation, Single Sample	Nitrate Rule	Nitrate	5283	Returned to Compliance	01-APR-2021	30-JUN-2021	Yes
MCL	Maximum Contaminant Level Violation, Single Sample	Nitrate Rule	Nitrate	5286	Returned to Compliance	01-JAN-2021	31-DEC-2021	Yes
MCL	Maximum Contaminant Level Violation, Single Sample	Nitrate Rule	Nitrate	5282	Returned to Compliance	01-JUL-2020	30-SEP-2020	Yes
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	5281	Returned to Compliance	27-JUN-2020	-	No
MCL	Maximum Contaminant Level Violation, Single Sample	Nitrate Rule	Nitrate	5280	Returned to Compliance	01-JAN-2020	31-DEC-2020	Yes
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	5212	Returned to Compliance	01-JAN-2015	-	No
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	5211	Returned to Compliance	01-DEC-2013	31-DEC-2013	No
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	5210	Returned to Compliance	01-JUL-2010	-	No
MCL	Maximum Contaminant Level Violation, Single Sample	Nitrate Rule	Nitrate	5208	Returned to Compliance	01-OCT-2007	31-DEC-2007	Yes
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	5209	Returned to Compliance	19-JUN-2006	-	No
MCL	Maximum Contaminant Level Violation, Single Sample	Nitrate Rule	Nitrate	5006	Returned to Compliance	01-APR-2006	30-JUN-2006	Yes
MCL	Maximum Contaminant Level Violation, Average	Nitrate Rule	Nitrate	703	Returned to Compliance	01-JUL-2003	30-SEP-2003	Yes
MR	Monitoring, Regular	Inorganic Chemicals	Nickel	2404	Returned to Compliance	01-JAN-2003	31-DEC-2003	No
MR	Monitoring, Regular	Inorganic Chemicals	Mercury	1404	Returned to Compliance	01-JAN-2003	31-DEC-2003	No
MR	Monitoring, Regular	Inorganic Chemicals	Fluoride	3504	Returned to Compliance	01-JAN-2003	31-DEC-2003	No
MR	Monitoring, Regular	Inorganic Chemicals	Cadmium	1204	Returned to Compliance	01-JAN-2003	31-DEC-2003	No
MR	Monitoring, Regular	Inorganic Chemicals	Barium	1104	Returned to Compliance	01-JAN-2003	31-DEC-2003	No
MR	Monitoring, Regular	Arsenic Rule	Arsenic	1004	Returned to Compliance	01-JAN-2003	31-DEC-2003	No
MR	Monitoring, Regular	Inorganic Chemicals	Thallium, Total	1704	Returned to Compliance	01-JAN-2003	31-DEC-2003	No
MR	Monitoring, Regular	Inorganic Chemicals	Beryllium, Total	1604	Returned to Compliance	01-JAN-2003	31-DEC-2003	No
MR	Monitoring, Regular	Inorganic Chemicals	Selenium	1804	Returned to Compliance	01-JAN-2003	31-DEC-2003	No
MR	Monitoring, Regular	Inorganic Chemicals	Antimony, Total	1504	Returned to Compliance	01-JAN-2003	31-DEC-2003	No
MR	Monitoring, Regular	Inorganic Chemicals	Chromium	1304	Returned to Compliance	01-JAN-2003	31-DEC-2003	No
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	602	Returned to Compliance	01-AUG-2002	31-AUG-2002	No
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	501	Returned to Compliance	01-APR-2001	30-APR-2001	No
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	400	Returned to Compliance	01-JUL-2000	-	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	397	Returned to Compliance	01-FEB-1997	28-FEB-1997	No
MCL	Maximum Contaminant Level Violation, Acute (TCR)	Total Coliform Rule	Coliform (TCR)	197	Returned to Compliance	01-DEC-1996	31-DEC-1996	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	297	Returned to Compliance	01-DEC-1996	31-DEC-1996	Yes

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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
3778	5299	SIE	State Public Notification requested	10-AUG-2025	State	-
3775	5298	SIE	State Public Notification requested	09-JUN-2025	State	-
3772	5297	SIE	State Public Notification requested	03-FEB-2025	State	-
3769	5296	SIE	State Public Notification requested	28-JUL-2024	State	-
3767	5289	SOX	State Compliance achieved	21-AUG-2023	State	-
3767	5286	SOX	State Compliance achieved	21-AUG-2023	State	-
3761	5291	SIF	State Public Notification received	10-AUG-2023	State	-
3759	5292	SIE	State Public Notification requested	01-AUG-2023	State	-
3749	5288	SIE	State Public Notification requested	25-JUL-2022	State	-
3747	5295	SFL	State Administrative/Compliance Order without penalty issued	09-MAY-2022	State	Order for Nitrates. Associated violations 5297, 5298, 5299 CR 11/21/25.
3747	5287	SFL	State Administrative/Compliance Order without penalty issued	09-MAY-2022	State	Order for Nitrates. Associated violations 5297, 5298, 5299 CR 11/21/25.
3747	5284	SFL	State Administrative/Compliance Order without penalty issued	09-MAY-2022	State	Order for Nitrates. Associated violations 5297, 5298, 5299 CR 11/21/25.
3747	5283	SFL	State Administrative/Compliance Order without penalty issued	09-MAY-2022	State	Order for Nitrates. Associated violations 5297, 5298, 5299 CR 11/21/25.
3747	5280	SFL	State Administrative/Compliance Order without penalty issued	09-MAY-2022	State	Order for Nitrates. Associated violations 5297, 5298, 5299 CR 11/21/25.
3747	5282	SFL	State Administrative/Compliance Order without penalty issued	09-MAY-2022	State	Order for Nitrates. Associated violations 5297, 5298, 5299 CR 11/21/25.
3729	5281	SOX	State Compliance achieved	29-JUN-2020	State	-
3723	5211	SIF	State Public Notification received	14-MAR-2014	State	-
3722	5212	SOX	State Compliance achieved	31-JAN-2014	State	-
3714	5210	SOX	State Compliance achieved	16-JUL-2010	State	-
3711	5208	SOX	State Compliance achieved	30-NOV-2007	State	inactivated POE # 00124234 which returns the water system to compliance status for this nitrate violation. --DCS
3706	5006	SOX	State Compliance achieved	05-SEP-2006	State	2 quarters below MCL
3710	5209	SOX	State Compliance achieved	21-JUN-2006	State	PN performed on time, proof submitted late --DCS
2504	1104	SOX	State Compliance achieved	06-APR-2005	State	2002-2004 MONITORING VIOLATIONS
2504	1204	SOX	State Compliance achieved	06-APR-2005	State	2002-2004 MONITORING VIOLATIONS
2504	1304	SOX	State Compliance achieved	06-APR-2005	State	2002-2004 MONITORING VIOLATIONS
2504	1404	SOX	State Compliance achieved	06-APR-2005	State	2002-2004 MONITORING VIOLATIONS
2504	1504	SOX	State Compliance achieved	06-APR-2005	State	2002-2004 MONITORING VIOLATIONS
2504	1004	SOX	State Compliance achieved	06-APR-2005	State	2002-2004 MONITORING VIOLATIONS
2504	1704	SOX	State Compliance achieved	06-APR-2005	State	2002-2004 MONITORING VIOLATIONS
2504	1804	SOX	State Compliance achieved	06-APR-2005	State	2002-2004 MONITORING VIOLATIONS
2504	2404	SOX	State Compliance achieved	06-APR-2005	State	2002-2004 MONITORING VIOLATIONS
2504	3504	SOX	State Compliance achieved	06-APR-2005	State	2002-2004 MONITORING VIOLATIONS
2504	1604	SOX	State Compliance achieved	06-APR-2005	State	2002-2004 MONITORING VIOLATIONS
2304	703	SOX	State Compliance achieved	30-JUL-2004	State	Returned system back to compliance based of 3 quarterly results below Nitrate MC>
1602	602	SIF	State Public Notification received	07-JUL-2003	State	OAKLEY PN RCVD TCRM/R AUG02
3717	501	SOX	State Compliance achieved	31-MAY-2001	State	RETURNED TO COMPLIANCE AFTER TCR M/R APR2001 --JEH
1000	400	SOX	State Compliance achieved	08-SEP-2000	State	OAKLEY - SOX
3716	397	SOX	State Compliance achieved	31-MAR-1997	State	RETURNED TO COMPLIANCE AFTER TCR M/R FEB1997 --JEH
3715	297	SOX	State Compliance achieved	31-JAN-1997	State	RETURNED TO COMPLIANCE AFTER TCR ACUTE/MCL DEC1996 -- JEH
3715	197	SOX	State Compliance achieved	31-JAN-1997	State	RETURNED TO COMPLIANCE AFTER TCR ACUTE/MCL DEC1996 -- JEH

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All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
WELL 09 EMERGENCY	665	Yes	Well	Ground water	Emergency	Inactive
WELL 06 SEASONAL	668	Yes	Well	Ground water	Seasonal	Active
WELL 08	667	Yes	Well	Ground water	Permanent	Active
WELL 07	666	Yes	Well	Ground water	Permanent	Active
WELL 10	664	Yes	Well	Ground water	Permanent	Active
WELL 11 ABANDONED	663	Yes	Well	Ground water	Other	Inactive
TEST WELL 1201	12660	Yes	Well	Ground water	Other	Inactive
TESTWELL 1101	12370	Yes	Well	Ground water	Other	Inactive
TEST WELL 0901	10656	Yes	Well	Ground water	Other	Inactive
DISTRIBUTION	5138	No	Distribution System/Zone	-	-	Active
PUMP FACILITY	8507	No	Pump Facility	-	-	Active
SYSTEM LOCATION	11771	No	Sampling Station	-	-	Active
STORAGE TANK 01	7183	No	Storage	-	-	Active
TP005	2822	No	Treatment Plant	-	-	Active
TP003	3190	No	Treatment Plant	-	-	Active
TP001 SEASONAL	3191	No	Treatment Plant	-	-	Active
TP002	3192	No	Treatment Plant	-	-	Active
TP004 EMERGENCY	3189	No	Treatment Plant	-	-	Inactive

1 - 18 of 18

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
TP005	2822	Activated Carbon, Granular	Organics removal
TP005	2822	Gaseous Chlorination, Post	Disinfection
TP005	2822	Aeration, Packed Tower	Organics removal
TP004 EMERGENCY	3189	Gaseous Chlorination, Post	Disinfection
TP003	3190	Gaseous Chlorination, Post	Disinfection
TP001 SEASONAL	3191	Gaseous Chlorination, Post	Disinfection
TP002	3192	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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