Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	IA6273005
PWS Name	OSKALOOSA MUNICIPAL WATER DEPT
PWS Type	Community water system
Owner Type	Local government
Primary Source	Groundwater under influence of surface water
Primacy Type	State
Is Wholesaler?	No
Population Served	12808
County Served	Mahaska

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, Regular	Synthetic Organic Chemicals	Di(2-ethylhexyl) phthalate	152924	Returned to Compliance	01-JAN-2024	31-MAR-2024	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Di(2-ethylhexyl) phthalate	93824	Returned to Compliance	01-OCT-2023	31-DEC-2023	No
MON	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	87421	Returned to Compliance	01-FEB-2021	28-FEB-2021	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	179615	Returned to Compliance	01-AUG-2015	31-AUG-2015	Yes
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	CARBON, TOTAL	68115	Returned to Compliance	01-OCT-2014	31-DEC-2014	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	CARBON, TOTAL	1057112	Returned to Compliance	01-APR-2012	30-JUN-2012	No
TT	Single Turbidity Exceed (Enhanced SWTR)	Interim and Long Term 1 Enhanced Surface Water Treatment Rule	Interim Enhanced Surface Water Treatment Rule	747011	Returned to Compliance	01-FEB-2011	28-FEB-2011	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	329509	Returned to Compliance	01-SEP-2009	30-SEP-2009	Yes
TT	Monthly Turbidity Exceed (Enhanced SWTR)	Interim and Long Term 1 Enhanced Surface Water Treatment Rule	Interim Enhanced Surface Water Treatment Rule	39509	Returned to Compliance	01-OCT-2008	31-OCT-2008	Yes
TT	Monthly Turbidity Exceed (Enhanced SWTR)	Interim and Long Term 1 Enhanced Surface Water Treatment Rule	Interim Enhanced Surface Water Treatment Rule	59308	Returned to Compliance	01-AUG-2007	31-AUG-2007	Yes
TT	Monthly Turbidity Exceed (Enhanced SWTR)	Interim and Long Term 1 Enhanced Surface Water Treatment Rule	Interim Enhanced Surface Water Treatment Rule	479907	Returned to Compliance	01-MAY-2007	31-MAY-2007	Yes
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	399499	Returned to Compliance	01-MAY-1999	31-MAY-1999	No
TT	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Surface Water Treatment Rule	79800	Returned to Compliance	01-APR-1999	30-APR-1999	Yes
TT	Treatment Technique (SWTR and GWR)	Surface Water Treatment Rule	Surface Water Treatment Rule	96099	Known	01-OCT-1998	30-SEP-1999	Yes
MR	Monitoring, Regular	Synthetic Organic Chemicals	Atrazine	213395	Returned to Compliance	01-JUL-1995	30-SEP-1995	No
MR	Monitoring, Regular	Nitrate Rule	Nitrate	220994	Returned to Compliance	01-APR-1994	30-JUN-1994	No
MR	Monitoring, Regular	Volatile Organic Chemicals	trans-1,2-Dichloroethylene	184992	Returned to Compliance	01-JAN-1992	31-MAR-1992	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,2-Dichloropropane	183592	Returned to Compliance	01-JAN-1992	31-MAR-1992	No
MR	Monitoring, Regular	Volatile Organic Chemicals	1,1,2-Trichloroethane	185092	Returned to Compliance	01-JAN-1992	31-MAR-1992	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Tetrachloroethylene	185292	Returned to Compliance	01-JAN-1992	31-MAR-1992	No
MR	Monitoring, Regular	Volatile Organic Chemicals	CHLOROBENZENE	185492	Returned to Compliance	01-JAN-1992	31-MAR-1992	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Toluene	185592	Returned to Compliance	01-JAN-1992	31-MAR-1992	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Ethylbenzene	185692	Returned to Compliance	01-JAN-1992	31-MAR-1992	No
MR	Monitoring, Regular	Volatile Organic Chemicals	o-Dichlorobenzene	184692	Returned to Compliance	01-JAN-1992	31-MAR-1992	No
MR	Monitoring, Regular	Volatile Organic Chemicals	DICHLOROMETHANE	184292	Returned to Compliance	01-JAN-1992	31-MAR-1992	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Xylenes, Total	184792	Returned to Compliance	01-JAN-1992	31-MAR-1992	No
MR	Monitoring, Regular	Volatile Organic Chemicals	cis-1,2-Dichloroethylene	183892	Returned to Compliance	01-JAN-1992	31-MAR-1992	No
MR	Monitoring, Regular	Volatile Organic Chemicals	Styrene	185892	Returned to Compliance	01-JAN-1992	31-MAR-1992	No

1 - 28 of 28

Enforcement Actions

Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
805737	152924	SIF	State Public Notification received	10-JUN-2025	State	-
805735	93824	SOX	State Compliance achieved	03-JUL-2024	State	-
805730	87421	SIF	State Public Notification received	11-JUN-2021	State	-
805721	179615	SOX	State Compliance achieved	26-OCT-2015	State	-
805720	68115	SIF	State Public Notification received	01-JUL-2015	State	In the CCR - link provided in billing statement
805710	1057112	SIF	State Public Notification received	03-JUN-2013	State	-
805709	747011	SOX	State Compliance achieved	01-APR-2011	State	-
11	329509	SOX	State Compliance achieved	10-MAR-2010	State	-
5	39509	SOX	State Compliance achieved	05-MAY-2009	State	-
2	479907	SOX	State Compliance achieved	05-MAR-2008	State	per email FO5
3	59308	SOX	State Compliance achieved	05-MAR-2008	State	per email FO5
803900	79800	SOX	State Compliance achieved	08-MAY-2000	State	-
803599	399499	SOX	State Compliance achieved	30-JUN-1999	State	-
387094	220994	SOX	State Compliance achieved	05-JUN-1996	State	-
307795	213395	SIF	State Public Notification received	26-MAR-1996	State	-
318892	183892	SIF	State Public Notification received	03-JUN-1992	State	-
353592	183592	SIF	State Public Notification received	03-JUN-1992	State	-
618492	184292	SIF	State Public Notification received	03-JUN-1992	State	-
539692	184692	SIF	State Public Notification received	03-JUN-1992	State	-
384292	184792	SIF	State Public Notification received	03-JUN-1992	State	-
711592	185892	SIF	State Public Notification received	03-JUN-1992	State	-
442592	185692	SIF	State Public Notification received	03-JUN-1992	State	-
492792	185592	SIF	State Public Notification received	03-JUN-1992	State	-
5992	185492	SIF	State Public Notification received	03-JUN-1992	State	-
321792	184992	SIF	State Public Notification received	03-JUN-1992	State	-
724092	185092	SIF	State Public Notification received	03-JUN-1992	State	-
446792	185292	SIF	State Public Notification received	03-JUN-1992	State	-

1 - 27 of 27

All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
PLUGGED WELL #30 (1991)	7779	Yes	Well	Ground water under the influence of surface water	Other	Inactive
WELL #23 ( 2014 ) PLUGGED	11097	Yes	Well	Ground water under the influence of surface water	Permanent	Inactive
WELL #27 (1988)	7748	Yes	Well	Ground water under the influence of surface water	Permanent	Active
WELL #36 (2021)	36389	Yes	Well	Ground water under the influence of surface water	Permanent	Active
WELL #35 (2010)	31273	Yes	Well	Ground water under the influence of surface water	Permanent	Active
WELL #34	31272	Yes	Well	Ground water under the influence of surface water	Permanent	Active
WELL #33 (2004)	28827	Yes	Well	Ground water under the influence of surface water	Permanent	Active
WELL #25 (1980)	13555	Yes	Well	Ground water under the influence of surface water	Permanent	Active
WELL #26 (1980)	12912	Yes	Well	Ground water under the influence of surface water	Permanent	Active
WELL #22 (1974)	12672	Yes	Well	Ground water under the influence of surface water	Permanent	Active
WELL #29 (1991)	11231	Yes	Well	Ground water under the influence of surface water	Permanent	Active
WELL #32 (1997)	10868	Yes	Well	Ground water under the influence of surface water	Permanent	Active
WELL #31 (1997)	10867	Yes	Well	Ground water under the influence of surface water	Permanent	Active
WELL #28 (1988)	10303	Yes	Well	Ground water under the influence of surface water	Permanent	Active
PLUGGED WELL #21 (1974)	7944	Yes	Well	Ground water	Other	Inactive
PLUGGED WELL #17 (1988)	10725	Yes	Well	Ground water	Other	Inactive
PLUGGED WELL #20 (1974)	10133	Yes	Well	Ground water	Other	Inactive
PLUGGED WELL #19 (1990)	7933	Yes	Well	Ground water under the influence of surface water	Other	Inactive
PLUGGED WELL #24 (1990)	7926	Yes	Well	Ground water under the influence of surface water	Other	Inactive
DISTRIBUTION SYSTEM	2990	No	Distribution System/Zone	-	-	Active
COMBINED DISTRIBUTION SYSTEM	30910	No	Distribution System/Zone	-	-	Active
GENERAL PWS FACILITY	24640	No	Other	-	-	Active
CC TO OAK CREEK MHP, IA6273601	37292	No	Other	-	-	Active
CC TO BEACON WS, IA6203093	18568	No	Other	-	-	Inactive
CC TO UNIVERSITY PARK WS, IA6290040	18569	No	Other	-	-	Inactive
CC TO MAHASKA RWS, IA6273901	18570	No	Other	-	-	Inactive
HIGH SERVICE PUMP STATION	35405	No	Pump Facility	-	-	Active
HIGH SERVICE PUMP STATION	37125	No	Pump Facility	-	-	Active
HIGH SERVICE PUMP STATION	37126	No	Pump Facility	-	-	Active
CONTROL PANEL TAP AT PLANT	5097	No	Sampling Station	-	-	Active
ELEVATED STORAGE (NORTH)-0.4MG	14194	No	Storage	-	-	Active
CLEARWELL STORAGE-0.85 MG	26861	No	Storage	-	-	Active
CLEARWELL STORAGE-0.25MG	31637	No	Storage	-	-	Active
ELEVATED STORAGE(SOUTH)-0.5MG	31638	No	Storage	-	-	Active
TREATMENT PLANT	21065	No	Treatment Plant	-	-	Active

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Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
TREATMENT PLANT	21065	Fluoridation	Other
TREATMENT PLANT	21065	Filtered	Particulate removal
TREATMENT PLANT	21065	Innovative	Particulate removal
TREATMENT PLANT	21065	Innovative	Particulate removal
TREATMENT PLANT	21065	Innovative	Other
TREATMENT PLANT	21065	Inhibitor, Polyphosphate	Corrosion control
TREATMENT PLANT	21065	Innovative	Disinfection
TREATMENT PLANT	21065	Innovative	Disinfection
TREATMENT PLANT	21065	Coagulation	Particulate removal
TREATMENT PLANT	21065	Innovative	Particulate removal
TREATMENT PLANT	21065	Sedimentation	Particulate removal
TREATMENT PLANT	21065	Innovative	Particulate removal
TREATMENT PLANT	21065	Innovative	Particulate removal
TREATMENT PLANT	21065	Innovative	Particulate removal
TREATMENT PLANT	21065	Innovative	Taste / odor control
TREATMENT PLANT	21065	Innovative	Taste / odor control
TREATMENT PLANT	21065	Innovative	Corrosion control
TREATMENT PLANT	21065	Innovative	Softening (hardness removal)
TREATMENT PLANT	21065	Innovative	Softening (hardness removal)
TREATMENT PLANT	21065	Lime - Soda Ash Addition	Softening (hardness removal)

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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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