Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	MO6010659
PWS Name	POTOSI PWS
PWS Type	Community water system
Owner Type	Local government
Primary Source	Ground water
Primacy Type	State
Is Wholesaler?	No
Population Served	2527
County Served	Washington

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
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	8430453	Returned to Compliance	27-APR-2024	-	No
MON	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	8430452	Returned to Compliance	01-MAR-2023	31-MAR-2023	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	8430451	Returned to Compliance	01-DEC-2015	31-DEC-2015	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	8430450	Returned to Compliance	01-SEP-2015	30-SEP-2015	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	8430449	Returned to Compliance	01-NOV-2014	30-NOV-2014	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	8430447	Returned to Compliance	01-JUN-2013	30-JUN-2013	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	8430445	Returned to Compliance	01-OCT-2012	31-OCT-2012	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	8430444	Returned to Compliance	01-AUG-2012	31-AUG-2012	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	8430443	Returned to Compliance	01-APR-2012	30-APR-2012	Yes
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	8430441	Returned to Compliance	10-NOV-2011	-	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	8430442	Returned to Compliance	14-SEP-2011	-	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	8430436	Returned to Compliance	01-SEP-2011	30-SEP-2011	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	8430424	Returned to Compliance	01-JUL-2011	31-JUL-2011	Yes
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	8430429	Returned to Compliance	31-MAY-2011	-	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	8430421	Returned to Compliance	01-APR-2011	30-APR-2011	Yes
MR	Monitoring, Source Water (GWR)	Ground Water Rule	E. COLI	8430416	Returned to Compliance	01-SEP-2010	-	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	8430411	Returned to Compliance	01-JUL-2010	31-JUL-2010	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	8428908	Returned to Compliance	01-JUL-2008	31-JUL-2008	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	8428608	Returned to Compliance	01-MAY-2008	31-MAY-2008	Yes
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	8418808	Returned to Compliance	01-OCT-2007	31-DEC-2007	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Gross Alpha, Excl. Radon and U	8418708	Returned to Compliance	01-OCT-2007	31-DEC-2007	No
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	8428808	Returned to Compliance	01-APR-2007	31-MAR-2008	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Gross Alpha, Excl. Radon and U	8428708	Returned to Compliance	01-APR-2007	31-MAR-2008	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	8418608	Returned to Compliance	01-JAN-2007	31-DEC-2007	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Gross Alpha, Excl. Radon and U	8418508	Returned to Compliance	01-JAN-2007	31-DEC-2007	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	8417407	Returned to Compliance	01-DEC-2006	31-DEC-2006	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	8417107	Returned to Compliance	01-NOV-2006	30-NOV-2006	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	8416807	Returned to Compliance	01-OCT-2006	31-OCT-2006	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	8416606	Returned to Compliance	01-AUG-2006	31-AUG-2006	Yes
MCL	Maximum Contaminant Level Violation, Acute (TCR)	Total Coliform Rule	Coliform (TCR)	8416706	Returned to Compliance	01-AUG-2006	31-AUG-2006	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Gross Alpha, Excl. Radon and U	8417807	Returned to Compliance	01-APR-2006	31-MAR-2007	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	8417907	Returned to Compliance	01-APR-2006	31-MAR-2007	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	8416006	Returned to Compliance	01-APR-2006	30-APR-2006	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	8415906	Returned to Compliance	01-FEB-2006	28-FEB-2006	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Gross Alpha, Excl. Radon and U	8417607	Returned to Compliance	01-JAN-2006	31-DEC-2006	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	8417707	Returned to Compliance	01-JAN-2006	31-DEC-2006	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	8415806	Returned to Compliance	01-NOV-2005	30-NOV-2005	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	8417307	Returned to Compliance	01-OCT-2005	30-SEP-2006	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Gross Alpha, Excl. Radon and U	8417207	Returned to Compliance	01-OCT-2005	30-SEP-2006	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	8416506	Returned to Compliance	01-JUL-2005	30-JUN-2006	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Gross Alpha, Excl. Radon and U	8416406	Returned to Compliance	01-JUL-2005	30-JUN-2006	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Gross Alpha, Excl. Radon and U	8416106	Returned to Compliance	01-APR-2005	31-MAR-2006	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	8416206	Returned to Compliance	01-APR-2005	31-MAR-2006	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	8417007	Returned to Compliance	01-JAN-2005	31-DEC-2005	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Gross Alpha, Excl. Radon and U	8416907	Returned to Compliance	01-JAN-2005	31-DEC-2005	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Gross Alpha, Excl. Radon and U	8415606	Returned to Compliance	01-OCT-2004	30-SEP-2005	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	8415706	Known	01-OCT-2004	30-SEP-2005	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Gross Alpha, Excl. Radon and U	8415406	Known	01-JUL-2004	30-JUN-2005	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	8415506	Known	01-JUL-2004	30-JUN-2005	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	8415205	Known	01-APR-2004	31-MAR-2005	Yes

1 - 50 of 91

Enforcement Actions

Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
494975	8430452	SIF	State Public Notification received	24-MAY-2024	State	-
494976	8430453	SOX	State Compliance achieved	17-MAY-2024	State	-
494970	8430451	SOX	State Compliance achieved	03-MAY-2016	State	RTC per EPA policy SEH 5/3/16;
494969	798	SOX	State Compliance achieved	04-FEB-2016	State	-
494969	99994	SOX	State Compliance achieved	04-FEB-2016	State	-
494969	115995	SOX	State Compliance achieved	04-FEB-2016	State	-
494969	811196	SOX	State Compliance achieved	04-FEB-2016	State	-
494969	398	SOX	State Compliance achieved	04-FEB-2016	State	-
494969	397	SOX	State Compliance achieved	04-FEB-2016	State	-
494969	499	SOX	State Compliance achieved	04-FEB-2016	State	-
494969	917196	SOX	State Compliance achieved	04-FEB-2016	State	-
494969	299	SOX	State Compliance achieved	04-FEB-2016	State	-
494969	101	SOX	State Compliance achieved	04-FEB-2016	State	-
494969	8430450	SOX	State Compliance achieved	04-FEB-2016	State	-
494969	924793	SOX	State Compliance achieved	04-FEB-2016	State	-
494962	8430449	SOX	State Compliance achieved	05-FEB-2015	State	-
494957	8430411	SOX	State Compliance achieved	22-JAN-2014	State	-
494957	8428908	SOX	State Compliance achieved	22-JAN-2014	State	-
494957	8428608	SOX	State Compliance achieved	22-JAN-2014	State	-
494957	8413003	SOX	State Compliance achieved	22-JAN-2014	State	-
494957	8412802	SOX	State Compliance achieved	22-JAN-2014	State	-
494958	8412702	SOX	State Compliance achieved	22-JAN-2014	State	-
494958	2340892	SOX	State Compliance achieved	22-JAN-2014	State	-
494958	722793	SOX	State Compliance achieved	22-JAN-2014	State	-
494958	998	SOX	State Compliance achieved	22-JAN-2014	State	-
494957	8413104	SOX	State Compliance achieved	22-JAN-2014	State	-
494956	8430447	SOX	State Compliance achieved	17-JAN-2014	State	RTC per EPA policy, SDM 01/17/2014;
494953	8430444	SIA	State Violation/Reminder Notice	19-JUN-2013	State	LOW sent from SERO for bac-t MCL violations SEH 6/20/13;
494953	8430445	SIA	State Violation/Reminder Notice	19-JUN-2013	State	LOW sent from SERO for bac-t MCL violations SEH 6/20/13;
494953	8430443	SIA	State Violation/Reminder Notice	19-JUN-2013	State	LOW sent from SERO for bac-t MCL violations SEH 6/20/13;
494939	8430421	SIF	State Public Notification received	06-JUN-2012	State	-
494937	8430436	SIF	State Public Notification received	06-JUN-2012	State	-
494933	8430429	SIF	State Public Notification received	06-JUN-2012	State	Multi month PN performed.
494933	8430441	SIF	State Public Notification received	06-JUN-2012	State	Multi month PN performed.
494933	8430442	SIF	State Public Notification received	06-JUN-2012	State	Multi month PN performed.
494935	8430424	SIF	State Public Notification received	06-JUN-2012	State	-
494929	8430416	SOX	State Compliance achieved	31-JAN-2012	State	RTC PER EPA POLICY, JLW 31JAN12;
494918	8415606	SOX	State Compliance achieved	31-DEC-2010	State	SOX CREATED FOR RADS VIOLATIONS PER EPA POLICY
494918	8416106	SOX	State Compliance achieved	31-DEC-2010	State	SOX CREATED FOR RADS VIOLATIONS PER EPA POLICY
494918	8416206	SOX	State Compliance achieved	31-DEC-2010	State	SOX CREATED FOR RADS VIOLATIONS PER EPA POLICY
494918	8416406	SOX	State Compliance achieved	31-DEC-2010	State	SOX CREATED FOR RADS VIOLATIONS PER EPA POLICY
494918	8416506	SOX	State Compliance achieved	31-DEC-2010	State	SOX CREATED FOR RADS VIOLATIONS PER EPA POLICY
494918	8416907	SOX	State Compliance achieved	31-DEC-2010	State	SOX CREATED FOR RADS VIOLATIONS PER EPA POLICY
494918	8417007	SOX	State Compliance achieved	31-DEC-2010	State	SOX CREATED FOR RADS VIOLATIONS PER EPA POLICY
494918	8417207	SOX	State Compliance achieved	31-DEC-2010	State	SOX CREATED FOR RADS VIOLATIONS PER EPA POLICY
494918	8417307	SOX	State Compliance achieved	31-DEC-2010	State	SOX CREATED FOR RADS VIOLATIONS PER EPA POLICY
494918	8417607	SOX	State Compliance achieved	31-DEC-2010	State	SOX CREATED FOR RADS VIOLATIONS PER EPA POLICY
494918	8417707	SOX	State Compliance achieved	31-DEC-2010	State	SOX CREATED FOR RADS VIOLATIONS PER EPA POLICY
494918	8417807	SOX	State Compliance achieved	31-DEC-2010	State	SOX CREATED FOR RADS VIOLATIONS PER EPA POLICY
494918	8417907	SOX	State Compliance achieved	31-DEC-2010	State	SOX CREATED FOR RADS VIOLATIONS PER EPA POLICY

1 - 50 of 91

All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
WELL # 6 - LAWRENCE ST-SRV CTY & DIST	83517	Yes	Well	Ground water	Other	Active
WELL # 3	83514	Yes	Well	Ground water	Permanent	Inactive
WELL # 9	98728	Yes	Well	Ground water	Permanent	Active
WELL # 8	98727	Yes	Well	Ground water	Permanent	Active
WELL # 5 -LILAC DR & P HWY-SVE CTY & DST	83516	Yes	Well	Ground water	Permanent	Active
WELL # 4 - VALLEY RD	83515	Yes	Well	Ground water	Permanent	Active
DISTRIBUTION SYSTEM	88041	No	Distribution System/Zone	-	-	Active
CHEMICAL SAMPLES	92894	No	Sampling Station	-	-	Active
735K GAL STANDPIPE	76967	No	Storage	-	-	Active
683K GAL STANDPIPE	97185	No	Storage	-	-	Active
680K GAL HWY 8 & O STANDPIPE	97186	No	Storage	-	-	Active
STORAGE TANK	75303	No	Storage	-	-	Inactive
WELL #4 - VALLEY RD TREATMENT	106915	No	Treatment Plant	-	-	Active
WELL #5 -LILAC DR & P HYW -TREATMENT	106916	No	Treatment Plant	-	-	Active
WELL #8 TREATMENT	106917	No	Treatment Plant	-	-	Active
WELL #9 TREATMENT	106918	No	Treatment Plant	-	-	Active

1 - 16 of 16

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
WELL #4 - VALLEY RD TREATMENT	106915	Hypochlorination, Post	Disinfection
WELL #5 -LILAC DR & P HYW -TREATMENT	106916	Hypochlorination, Post	Disinfection
WELL #8 TREATMENT	106917	Hypochlorination, Post	Disinfection
WELL #9 TREATMENT	106918	Hypochlorination, Post	Disinfection

1 - 4 of 4

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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