Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	OK2002412
PWS Name	ENID
PWS Type	Community water system
Owner Type	Local government
Primary Source	Ground water
Primacy Type	State
Is Wholesaler?	No
Population Served	49347
County Served	Garfield

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
TT	LSL Inventory	Lead and Copper Rule Revisions	LEAD AND COPPER RULE REVISIONS	283202	Returned to Compliance	17-OCT-2024	-	Yes
RPT	LSL Reporting	Lead and Copper Rule Revisions	LEAD AND COPPER RULE REVISIONS	283203	Returned to Compliance	17-OCT-2024	-	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	283199	Returned to Compliance	01-JAN-2024	31-DEC-2024	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	283200	Returned to Compliance	01-JAN-2024	31-DEC-2024	No
MR	Monitoring, Regular	Inorganic Chemicals	Asbestos	283201	Known	01-JAN-2024	31-DEC-2024	No
MR	Monitoring, Regular	Inorganic Chemicals	Asbestos	283197	Known	01-JAN-2023	31-DEC-2023	No
MR	Monitoring, Regular	Inorganic Chemicals	Asbestos	283196	Known	01-JAN-2022	31-DEC-2022	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	283195	Returned to Compliance	01-SEP-2021	31-AUG-2022	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	283194	Returned to Compliance	01-SEP-2021	31-AUG-2022	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	283171	Returned to Compliance	01-SEP-2019	31-AUG-2020	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	283170	Returned to Compliance	01-SEP-2019	31-AUG-2020	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	283167	Returned to Compliance	01-SEP-2018	31-AUG-2019	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	283168	Returned to Compliance	01-SEP-2018	31-AUG-2019	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	283111	Returned to Compliance	01-MAY-2013	31-MAY-2013	Yes
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	TTHM	283107	Returned to Compliance	01-JAN-2010	31-DEC-2010	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	283108	Returned to Compliance	01-JAN-2010	31-DEC-2010	No
MR	Monitoring, Source Water (GWR)	Ground Water Rule	E. COLI	283112	Returned to Compliance	01-DEC-2009	31-DEC-2009	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	283105	Known	01-OCT-2005	31-DEC-2005	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	TTHM	68805	Returned to Compliance	01-OCT-2005	31-DEC-2005	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	68905	Returned to Compliance	01-OCT-2005	31-DEC-2005	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	TTHM	283005	Known	01-OCT-2005	31-DEC-2005	No
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	282598	Returned to Compliance	01-SEP-1998	30-SEP-1998	No
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	282198	Returned to Compliance	01-JUL-1998	31-JUL-1998	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	54796	Returned to Compliance	01-MAY-1996	31-MAY-1996	Yes
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	13395	Returned to Compliance	01-DEC-1994	31-DEC-1994	No
MCL	Maximum Contaminant Level Violation, Acute (TCR)	Total Coliform Rule	Coliform (TCR)	44393	Returned to Compliance	01-MAY-1993	31-MAY-1993	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	33693	Returned to Compliance	01-MAR-1993	31-MAR-1993	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	68392	Returned to Compliance	01-JUN-1992	30-JUN-1992	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	38291	Returned to Compliance	01-MAY-1991	31-MAY-1991	Yes

1 - 29 of 29

Enforcement Actions

Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
769	283199	SOX	State Compliance achieved	16-SEP-2025	State	-
769	283200	SOX	State Compliance achieved	16-SEP-2025	State	-
768	283203	SOX	State Compliance achieved	15-JUL-2025	State	-
767	283202	SOX	State Compliance achieved	15-JUL-2025	State	-
763	283201	SIF	State Public Notification received	18-JUN-2025	State	-
758	283197	SIF	State Public Notification received	30-APR-2024	State	-
753	283196	SIF	State Public Notification received	13-MAR-2024	State	-
754	283194	SIF	State Public Notification received	19-OCT-2023	State	-
755	283195	SIF	State Public Notification received	19-OCT-2023	State	-
746	283171	SIF	State Public Notification received	06-NOV-2021	State	-
747	283170	SIF	State Public Notification received	06-NOV-2021	State	-
744	283168	SIF	State Public Notification received	20-NOV-2020	State	-
743	283167	SIF	State Public Notification received	20-NOV-2020	State	-
728	282198	SOX	State Compliance achieved	04-AUG-2016	State	AUTOMATIC RETURN TO COMPLIANCE 8/4/2016 - Violations Should be Closed Out because PWS is in complaince.
721	283112	SOX	State Compliance achieved	04-AUG-2016	State	AUTOMATIC RETURN TO COMPLIANCE 8/4/2016 - Violations Should be Closed Out because PWS is in complaince.
729	282598	SOX	State Compliance achieved	04-AUG-2016	State	AUTOMATIC RETURN TO COMPLIANCE 8/4/2016 - Violations Should be Closed Out because PWS is in complaince.
725	13395	SOX	State Compliance achieved	04-AUG-2016	State	AUTOMATIC RETURN TO COMPLIANCE 8/4/2016 - Violations Should be Closed Out because PWS is in complaince.
723	33693	SOX	State Compliance achieved	04-AUG-2016	State	AUTOMATIC RETURN TO COMPLIANCE 8/4/2016 - Violations Should be Closed Out because PWS is in complaince.
721	38291	SOX	State Compliance achieved	04-AUG-2016	State	AUTOMATIC RETURN TO COMPLIANCE 8/4/2016 - Violations Should be Closed Out because PWS is in complaince.
724	44393	SOX	State Compliance achieved	04-AUG-2016	State	AUTOMATIC RETURN TO COMPLIANCE 8/4/2016 - Violations Should be Closed Out because PWS is in complaince.
726	54796	SOX	State Compliance achieved	04-AUG-2016	State	AUTOMATIC RETURN TO COMPLIANCE 8/4/2016 - Violations Should be Closed Out because PWS is in complaince.
722	68392	SOX	State Compliance achieved	04-AUG-2016	State	AUTOMATIC RETURN TO COMPLIANCE 8/4/2016 - Violations Should be Closed Out because PWS is in complaince.
713	283111	SIF	State Public Notification received	25-JUL-2013	State	-
714	283108	SOX	State Compliance achieved	01-AUG-2011	State	Closed out DBP MR violation
714	283107	SOX	State Compliance achieved	01-AUG-2011	State	Closed out DBP MR violation
606	283005	SIF	State Public Notification received	19-JUL-2006	State	-
606	68905	SIF	State Public Notification received	19-JUL-2006	State	-
606	68805	SIF	State Public Notification received	19-JUL-2006	State	-
606	283105	SIF	State Public Notification received	19-JUL-2006	State	-

1 - 29 of 29

All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
WELL R-25	12990	Yes	Well	Ground water	Emergency	Active
WELL R-24	12988	Yes	Well	Ground water	Permanent	Inactive
WELL R-23	12987	Yes	Well	Ground water	Permanent	Inactive
WELL R-19	12982	Yes	Well	Ground water	Permanent	Inactive
WELL R-17	12979	Yes	Well	Ground water	Permanent	Inactive
WELL R-16	12978	Yes	Well	Ground water	Permanent	Inactive
WELL R-15	12977	Yes	Well	Ground water	Permanent	Inactive
WELL R-13	12975	Yes	Well	Ground water	Permanent	Inactive
WELL R-6	12968	Yes	Well	Ground water	Permanent	Inactive
WELL R-4	12966	Yes	Well	Ground water	Permanent	Inactive
WELL R-3	12965	Yes	Well	Ground water	Permanent	Inactive
WELL R-1	12963	Yes	Well	Ground water	Permanent	Inactive
WELL S-28	12959	Yes	Well	Ground water	Permanent	Inactive
WELL S-26	12956	Yes	Well	Ground water	Permanent	Inactive
WELL S-24	12955	Yes	Well	Ground water	Permanent	Inactive
WELL S-9	12940	Yes	Well	Ground water	Permanent	Inactive
WELL S-7	12938	Yes	Well	Ground water	Permanent	Inactive
WELL S-2	12933	Yes	Well	Ground water	Permanent	Inactive
04 AMES	12879	Yes	Well	Ground water	Permanent	Inactive
12 CARRIER	12878	Yes	Well	Ground water	Permanent	Inactive
27 DRUMMOND	12876	Yes	Well	Ground water	Permanent	Inactive
14 DRUMMOND	12874	Yes	Well	Ground water	Permanent	Inactive
15 DRUMMOND	12873	Yes	Well	Ground water	Permanent	Inactive
17 DRUMMOND	12867	Yes	Well	Ground water	Permanent	Inactive
05 VAN BUREN	12865	Yes	Well	Ground water	Permanent	Inactive
19 DRUMMOND	12863	Yes	Well	Ground water	Permanent	Inactive
01 PLANT	12855	Yes	Well	Ground water	Permanent	Inactive
03 NORTHWEST	12854	Yes	Well	Ground water	Permanent	Inactive
17 AMES	12852	Yes	Well	Ground water	Permanent	Inactive
13 CARRIER	12851	Yes	Well	Ground water	Permanent	Inactive
04 VAN BUREN	12849	Yes	Well	Ground water	Permanent	Inactive
11 DRUMMOND	12828	Yes	Well	Ground water	Permanent	Inactive
15 AMES	12826	Yes	Well	Ground water	Permanent	Inactive
11 CARRIER	12822	Yes	Well	Ground water	Permanent	Inactive
01 NORTHWEST	12820	Yes	Well	Ground water	Permanent	Inactive
08 NORTHWEST	12817	Yes	Well	Ground water	Permanent	Inactive
07 NORTHWEST	12801	Yes	Well	Ground water	Permanent	Inactive
10 AMES	12798	Yes	Well	Ground water	Permanent	Inactive
32 DRUMMOND	12795	Yes	Well	Ground water	Permanent	Inactive
37 AMES	29027	Yes	Well	Ground water	Permanent	Active
36 AMES	29026	Yes	Well	Ground water	Permanent	Active
39 AMES	29025	Yes	Well	Ground water	Permanent	Active
40 AMES	29024	Yes	Well	Ground water	Permanent	Active
38 AMES	29023	Yes	Well	Ground water	Permanent	Active
35 AMES	28957	Yes	Well	Ground water	Permanent	Active
32 AMES	28956	Yes	Well	Ground water	Permanent	Active
02 VAN BUREN	28602	Yes	Well	Ground water	Permanent	Active
SVC-2	28601	Yes	Well	Ground water	Permanent	Active
SVC-1	28600	Yes	Well	Ground water	Permanent	Active
S-34	28599	Yes	Well	Ground water	Permanent	Active

1 - 50 of 192

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
CHLORINATION AND FLUORIDE FEEDER STATION	11032	Fluoridation	Other
CHLORINATION AND FLUORIDE FEEDER STATION	11032	Gaseous Chlorination, Post	Disinfection
CHLORINATION STATION	11038	Gaseous Chlorination, Post	Disinfection
CHLORINATION STATION	11038	4-Log Treatment of Viruses	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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