Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	055294502
PWS Name	PRAIRIE ISLAND
PWS Type	Community water system
Owner Type	Tribal Government
Primary Source	Ground water
Primacy Type	Tribal
Is Wholesaler?	No
Population Served	6699
County Served

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
RPT	LSL Reporting	Lead and Copper Rule Revisions	LEAD AND COPPER RULE REVISIONS	1007629	Returned to Compliance	17-OCT-2024	-	No
MR	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	Lead and Copper Rule	1007627	Returned to Compliance	01-OCT-2023	-	No
RPT	Reporting, Assessment Forms (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	1007626	Returned to Compliance	01-AUG-2023	-	No
MR	Monitoring, Regular	Nitrate Rule	Nitrate	1007628	Returned to Compliance	01-JAN-2023	31-DEC-2023	No
MR	Monitoring, Regular	Inorganic Chemicals	Mercury	1007615	Returned to Compliance	01-JAN-2017	31-DEC-2019	No
MR	Monitoring, Regular	Inorganic Chemicals	Nickel	1007616	Returned to Compliance	01-JAN-2017	31-DEC-2019	No
MR	Monitoring, Regular	Inorganic Chemicals	Selenium	1007621	Returned to Compliance	01-JAN-2017	31-DEC-2019	No
MR	Monitoring, Regular	Inorganic Chemicals	Chromium	1007612	Returned to Compliance	01-JAN-2017	31-DEC-2019	No
MR	Monitoring, Regular	Inorganic Chemicals	Antimony, Total	1007617	Returned to Compliance	01-JAN-2017	31-DEC-2019	No
MR	Monitoring, Regular	Inorganic Chemicals	Fluoride	1007614	Returned to Compliance	01-JAN-2017	31-DEC-2019	No
MR	Monitoring, Regular	Inorganic Chemicals	CYANIDE	1007613	Returned to Compliance	01-JAN-2017	31-DEC-2019	No
MR	Monitoring, Regular	Inorganic Chemicals	Cadmium	1007611	Returned to Compliance	01-JAN-2017	31-DEC-2019	No
MR	Monitoring, Regular	Inorganic Chemicals	Barium	1007610	Returned to Compliance	01-JAN-2017	31-DEC-2019	No
MR	Monitoring, Regular	Arsenic Rule	Arsenic	1007609	Returned to Compliance	01-JAN-2017	31-DEC-2019	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Heptachlor	1007623	Returned to Compliance	01-JAN-2017	31-DEC-2019	No
MR	Monitoring, Regular	Inorganic Chemicals	Asbestos	1007620	Returned to Compliance	01-JAN-2017	31-DEC-2019	No
MR	Monitoring, Regular	Inorganic Chemicals	Thallium, Total	1007619	Returned to Compliance	01-JAN-2017	31-DEC-2019	No
MR	Monitoring, Regular	Inorganic Chemicals	Beryllium, Total	1007618	Returned to Compliance	01-JAN-2017	31-DEC-2019	No
MR	Monitoring, Regular	Nitrate Rule	Nitrate	1007608	Returned to Compliance	01-JAN-2011	31-DEC-2011	No
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	1007607	Returned to Compliance	01-JUL-2006	-	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	ETHYLENE DIBROMIDE	1007405	Returned to Compliance	01-JAN-2002	31-DEC-2004	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Endrin	1004305	Returned to Compliance	01-JAN-2002	31-DEC-2004	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Chlordane	1007505	Returned to Compliance	01-JAN-2002	31-DEC-2004	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Pentachlorophenol	1007105	Returned to Compliance	01-JAN-2002	31-DEC-2004	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Benzo(a)pyrene	1007005	Returned to Compliance	01-JAN-2002	31-DEC-2004	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	HEXACHLOROBENZENE	1006905	Returned to Compliance	01-JAN-2002	31-DEC-2004	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	2,4,5-TP	1006805	Returned to Compliance	01-JAN-2002	31-DEC-2004	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	2,4-D	1006705	Returned to Compliance	01-JAN-2002	31-DEC-2004	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Total Polychlorinated Biphenyls (PCB)	1007205	Returned to Compliance	01-JAN-2002	31-DEC-2004	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Heptachlor epoxide	1006605	Returned to Compliance	01-JAN-2002	31-DEC-2004	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Heptachlor	1006505	Returned to Compliance	01-JAN-2002	31-DEC-2004	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	2,3,7,8-TCDD	1006405	Returned to Compliance	01-JAN-2002	31-DEC-2004	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	LASSO	1006305	Returned to Compliance	01-JAN-2002	31-DEC-2004	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Atrazine	1006205	Returned to Compliance	01-JAN-2002	31-DEC-2004	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Aldicarb	1006105	Returned to Compliance	01-JAN-2002	31-DEC-2004	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Carbofuran	1006005	Returned to Compliance	01-JAN-2002	31-DEC-2004	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Aldicarb sulfone	1005905	Returned to Compliance	01-JAN-2002	31-DEC-2004	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Aldicarb sulfoxide	1005805	Returned to Compliance	01-JAN-2002	31-DEC-2004	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Hexachlorocyclopentadiene	1005705	Returned to Compliance	01-JAN-2002	31-DEC-2004	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Dinoseb	1005605	Returned to Compliance	01-JAN-2002	31-DEC-2004	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Picloram	1005505	Returned to Compliance	01-JAN-2002	31-DEC-2004	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Di(2-ethylhexyl) phthalate	1005405	Returned to Compliance	01-JAN-2002	31-DEC-2004	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Simazine	1005305	Returned to Compliance	01-JAN-2002	31-DEC-2004	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	OXAMYL	1005205	Returned to Compliance	01-JAN-2002	31-DEC-2004	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Di(2-ethylhexyl) adipate	1005105	Returned to Compliance	01-JAN-2002	31-DEC-2004	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Glyphosate	1005005	Returned to Compliance	01-JAN-2002	31-DEC-2004	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Endothall	1004905	Returned to Compliance	01-JAN-2002	31-DEC-2004	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Diquat	1004805	Returned to Compliance	01-JAN-2002	31-DEC-2004	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Dalapon	1004705	Returned to Compliance	01-JAN-2002	31-DEC-2004	No
MR	Monitoring, Regular	Synthetic Organic Chemicals	Toxaphene	1004605	Returned to Compliance	01-JAN-2002	31-DEC-2004	No

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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
10436	1007628	EIF	Federal Public Notification received from PWS	30-JUN-2025	Region	-
10434	1007629	EIE	Federal Public Notification requested	15-APR-2025	Region	-
10428	1007627	EIE	Federal Public Notification requested	13-OCT-2023	Region	-
10425	1007626	EIE	Federal Public Notification requested	22-SEP-2023	Region	-
10416	1007612	EOX	Federal Compliance achieved	23-MAR-2021	Region	-
10416	1007620	EOX	Federal Compliance achieved	23-MAR-2021	Region	-
10416	1007609	EOX	Federal Compliance achieved	23-MAR-2021	Region	-
10416	1007610	EOX	Federal Compliance achieved	23-MAR-2021	Region	-
10416	1007611	EOX	Federal Compliance achieved	23-MAR-2021	Region	-
10416	1007621	EOX	Federal Compliance achieved	23-MAR-2021	Region	-
10416	1007613	EOX	Federal Compliance achieved	23-MAR-2021	Region	-
10416	1007614	EOX	Federal Compliance achieved	23-MAR-2021	Region	-
10416	1007615	EOX	Federal Compliance achieved	23-MAR-2021	Region	-
10416	1007616	EOX	Federal Compliance achieved	23-MAR-2021	Region	-
10416	1007617	EOX	Federal Compliance achieved	23-MAR-2021	Region	-
10416	1007618	EOX	Federal Compliance achieved	23-MAR-2021	Region	-
10416	1007619	EOX	Federal Compliance achieved	23-MAR-2021	Region	-
10415	1007623	EOX	Federal Compliance achieved	13-APR-2020	Region	-
10412	1007608	EIF	Federal Public Notification received from PWS	09-MAR-2012	Region	-
10408	1004305	EOX	Federal Compliance achieved	27-JUN-2008	Region	-
10408	1004405	EOX	Federal Compliance achieved	27-JUN-2008	Region	-
10408	1004505	EOX	Federal Compliance achieved	27-JUN-2008	Region	-
10408	1004605	EOX	Federal Compliance achieved	27-JUN-2008	Region	-
10408	1004705	EOX	Federal Compliance achieved	27-JUN-2008	Region	-
10408	1004805	EOX	Federal Compliance achieved	27-JUN-2008	Region	-
10408	1004905	EOX	Federal Compliance achieved	27-JUN-2008	Region	-
10408	1005005	EOX	Federal Compliance achieved	27-JUN-2008	Region	-
10408	1005105	EOX	Federal Compliance achieved	27-JUN-2008	Region	-
10408	1005205	EOX	Federal Compliance achieved	27-JUN-2008	Region	-
10408	1005305	EOX	Federal Compliance achieved	27-JUN-2008	Region	-
10408	1005405	EOX	Federal Compliance achieved	27-JUN-2008	Region	-
10408	1005505	EOX	Federal Compliance achieved	27-JUN-2008	Region	-
10408	1005605	EOX	Federal Compliance achieved	27-JUN-2008	Region	-
10408	1005705	EOX	Federal Compliance achieved	27-JUN-2008	Region	-
10408	1005805	EOX	Federal Compliance achieved	27-JUN-2008	Region	-
10408	1005905	EOX	Federal Compliance achieved	27-JUN-2008	Region	-
10408	1006005	EOX	Federal Compliance achieved	27-JUN-2008	Region	-
10408	1006105	EOX	Federal Compliance achieved	27-JUN-2008	Region	-
10408	1006205	EOX	Federal Compliance achieved	27-JUN-2008	Region	-
10408	1006305	EOX	Federal Compliance achieved	27-JUN-2008	Region	-
10408	1006405	EOX	Federal Compliance achieved	27-JUN-2008	Region	-
10408	1006505	EOX	Federal Compliance achieved	27-JUN-2008	Region	-
10408	1006605	EOX	Federal Compliance achieved	27-JUN-2008	Region	-
10408	1006705	EOX	Federal Compliance achieved	27-JUN-2008	Region	-
10408	1006805	EOX	Federal Compliance achieved	27-JUN-2008	Region	-
10408	1006905	EOX	Federal Compliance achieved	27-JUN-2008	Region	-
10408	1007005	EOX	Federal Compliance achieved	27-JUN-2008	Region	-
10408	1007105	EOX	Federal Compliance achieved	27-JUN-2008	Region	-
10408	1007205	EOX	Federal Compliance achieved	27-JUN-2008	Region	-
10408	1007305	EOX	Federal Compliance achieved	27-JUN-2008	Region	-

1 - 50 of 81

All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
PRAIRIE ISLAND WL#1	1245	Yes	Well	Ground water	Permanent	Active
PRAIRIE ISLAND WL#2	1246	Yes	Well	Ground water	Permanent	Active
DISTRIBUTION SYSTEM	771	No	Distribution System/Zone	-	-	Active
SAMPLING SITE # 1	1752	No	Sampling Station	-	-	Active
SAMPLING SITE # 2	1753	No	Sampling Station	-	-	Active
ENTRY POINT #1	770	No	Sampling Station	-	-	Active
TREATMENT PLANT #1	85	No	Treatment Plant	-	-	Active

1 - 7 of 7

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
TREATMENT PLANT #1	85	Gaseous Chlorination, Post	Disinfection
TREATMENT PLANT #1	85	Gaseous Chlorination, Pre	Disinfection
TREATMENT PLANT #1	85	Fluoridation	Other
TREATMENT PLANT #1	85	Filtration, Pressure Sand	Iron removal
TREATMENT PLANT #1	85	Filtration, Pressure Sand	Radionuclides removal

1 - 5 of 5

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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