Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	MO4021451
PWS Name	PILOT KNOB RURAL WD 1 DOE RUN AREA
PWS Type	Community water system
Owner Type	Local government
Primary Source	Ground water
Primacy Type	State
Is Wholesaler?	No
Population Served	507
County Served	St. Francois

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 and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	452	Known	01-JAN-2025	31-DEC-2025	No
MR	Monitoring and Reporting (DBP)	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	451	Known	01-JAN-2025	31-DEC-2025	No
MR	Monitoring of Treatment (SWTR-Unfilt/GWR)	Ground Water Rule	Groundwater Rule	450	Returned to Compliance	01-OCT-2024	31-OCT-2024	No
MR	Monitoring of Treatment (SWTR-Unfilt/GWR)	Ground Water Rule	Groundwater Rule	449	Returned to Compliance	01-JUL-2024	31-JUL-2024	No
Other	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	Consumer Confidence Rule	448	Returned to Compliance	01-JUL-2022	-	No
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	446	Returned to Compliance	01-JUL-2019	30-JUN-2020	Yes
MR	Monitoring of Treatment (SWTR-Unfilt/GWR)	Ground Water Rule	Groundwater Rule	442	Returned to Compliance	01-OCT-2016	31-OCT-2016	No
Other	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	Consumer Confidence Rule	441	Returned to Compliance	01-JUL-2016	-	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Radium-228	444	Returned to Compliance	01-JAN-2016	31-DEC-2016	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Radium-226	443	Returned to Compliance	01-JAN-2016	31-DEC-2016	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	432	Returned to Compliance	01-FEB-2014	28-FEB-2014	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	438	Returned to Compliance	01-OCT-2013	30-SEP-2014	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	437	Returned to Compliance	01-JUL-2013	30-JUN-2014	Yes
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	429	Returned to Compliance	01-APR-2013	30-APR-2013	No
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	436	Returned to Compliance	01-APR-2013	31-MAR-2014	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	431	Returned to Compliance	01-JAN-2013	31-DEC-2013	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	430	Returned to Compliance	01-OCT-2012	30-SEP-2013	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	428	Returned to Compliance	01-APR-2012	31-MAR-2013	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	427	Returned to Compliance	01-JAN-2012	31-DEC-2012	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	424	Returned to Compliance	01-OCT-2011	30-SEP-2012	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	423	Returned to Compliance	01-JUL-2011	30-JUN-2012	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	422	Returned to Compliance	01-APR-2011	31-MAR-2012	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	418	Returned to Compliance	01-JAN-2011	31-DEC-2011	Yes
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Radium-228	415	Returned to Compliance	01-JUL-2010	30-SEP-2010	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Radium-226	414	Returned to Compliance	01-JUL-2010	30-SEP-2010	No
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	417	Returned to Compliance	01-OCT-2009	30-SEP-2010	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	413	Returned to Compliance	01-JUL-2009	30-JUN-2010	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	412	Returned to Compliance	01-APR-2009	31-MAR-2010	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	411	Returned to Compliance	01-JAN-2009	31-DEC-2009	Yes
MR	Initial Tap Sampling for Pb and Cu	Lead and Copper Rule	Lead and Copper Rule	209	Returned to Compliance	01-JAN-2009	-	No
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	410	Returned to Compliance	01-OCT-2008	30-SEP-2009	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	409	Returned to Compliance	01-JUL-2008	30-JUN-2009	Yes
MCL	Maximum Contaminant Level Violation, Average	Radionuclides and Revised Rad Rule	Combined Radium (-226 and -228)	309	Returned to Compliance	01-APR-2008	31-MAR-2009	Yes

1 - 33 of 33

Enforcement Actions

Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
303	451	SFJ	State Formal Notice of Violation issued	10-DEC-2025	State	-
303	452	SFJ	State Formal Notice of Violation issued	10-DEC-2025	State	-
301	450	SIF	State Public Notification received	30-MAY-2025	State	-
300	449	SIF	State Public Notification received	30-MAY-2025	State	-
291	448	SOX	State Compliance achieved	29-NOV-2022	State	CURR CCR COMP SOX'D PREV VIO SKW 11-29-2022
290	446	SOX	State Compliance achieved	03-FEB-2021	State	SOX 02 vio per EPA's RTC policy. 3Q20 results bring RAA below MCL for one quarter. JMJ 2/3/21
282	441	SOX	State Compliance achieved	15-JUN-2017	State	CCR comp corr RTC prev CCR vio skw 6-15-17
281	438	SOX	State Compliance achieved	08-JUN-2017	State	AOC closed. Violations sox'd for AOC. March 2017 samples were at 15.1 for gross alpha and 4.9 for radium (below MCL of 15.5 and 5.5). SDM 06/09/2017;
281	437	SOX	State Compliance achieved	08-JUN-2017	State	AOC closed. Violations sox'd for AOC. March 2017 samples were at 15.1 for gross alpha and 4.9 for radium (below MCL of 15.5 and 5.5). SDM 06/09/2017;
281	436	SOX	State Compliance achieved	08-JUN-2017	State	AOC closed. Violations sox'd for AOC. March 2017 samples were at 15.1 for gross alpha and 4.9 for radium (below MCL of 15.5 and 5.5). SDM 06/09/2017;
281	431	SOX	State Compliance achieved	08-JUN-2017	State	AOC closed. Violations sox'd for AOC. March 2017 samples were at 15.1 for gross alpha and 4.9 for radium (below MCL of 15.5 and 5.5). SDM 06/09/2017;
281	430	SOX	State Compliance achieved	08-JUN-2017	State	AOC closed. Violations sox'd for AOC. March 2017 samples were at 15.1 for gross alpha and 4.9 for radium (below MCL of 15.5 and 5.5). SDM 06/09/2017;
281	423	SOX	State Compliance achieved	08-JUN-2017	State	AOC closed. Violations sox'd for AOC. March 2017 samples were at 15.1 for gross alpha and 4.9 for radium (below MCL of 15.5 and 5.5). SDM 06/09/2017;
281	427	SOX	State Compliance achieved	08-JUN-2017	State	AOC closed. Violations sox'd for AOC. March 2017 samples were at 15.1 for gross alpha and 4.9 for radium (below MCL of 15.5 and 5.5). SDM 06/09/2017;
281	424	SOX	State Compliance achieved	08-JUN-2017	State	AOC closed. Violations sox'd for AOC. March 2017 samples were at 15.1 for gross alpha and 4.9 for radium (below MCL of 15.5 and 5.5). SDM 06/09/2017;
281	444	SOX	State Compliance achieved	08-JUN-2017	State	AOC closed. Violations sox'd for AOC. March 2017 samples were at 15.1 for gross alpha and 4.9 for radium (below MCL of 15.5 and 5.5). SDM 06/09/2017;
281	443	SOX	State Compliance achieved	08-JUN-2017	State	AOC closed. Violations sox'd for AOC. March 2017 samples were at 15.1 for gross alpha and 4.9 for radium (below MCL of 15.5 and 5.5). SDM 06/09/2017;
281	428	SOX	State Compliance achieved	08-JUN-2017	State	AOC closed. Violations sox'd for AOC. March 2017 samples were at 15.1 for gross alpha and 4.9 for radium (below MCL of 15.5 and 5.5). SDM 06/09/2017;
281	422	SOX	State Compliance achieved	08-JUN-2017	State	AOC closed. Violations sox'd for AOC. March 2017 samples were at 15.1 for gross alpha and 4.9 for radium (below MCL of 15.5 and 5.5). SDM 06/09/2017;
277	442	SOX	State Compliance achieved	29-DEC-2016	State	RTC per EPA Policy, Alan M., 12/29/2016
265	409	SFO	State Administrative/Compliance Order with penalty issued	22-AUG-2014	State	Presented draft AOC to board president and operators, PWS to respond to the Dept on terms SEH 7/5/14; AOC signed by board president on 8-13-14 and by John Madras on 8/22/14, fully effective 8-22-14, Changed enforcement action status to taken and generated compliance schedule. The AOC covers a period of 2 years and requires the PWS to solve Rads MCL's SEH 8/26/14; Associated new vio's to enf action SEH 9/18/15; AOC closed on 06/08/2017. PWS in compliance with rads. March 2017 rads samples were 15.1 for gross alpha and 4.9 for combined radium (below 15.5 and 5.5). SDM 06/12/2017;
265	410	SFO	State Administrative/Compliance Order with penalty issued	22-AUG-2014	State	Presented draft AOC to board president and operators, PWS to respond to the Dept on terms SEH 7/5/14; AOC signed by board president on 8-13-14 and by John Madras on 8/22/14, fully effective 8-22-14, Changed enforcement action status to taken and generated compliance schedule. The AOC covers a period of 2 years and requires the PWS to solve Rads MCL's SEH 8/26/14; Associated new vio's to enf action SEH 9/18/15; AOC closed on 06/08/2017. PWS in compliance with rads. March 2017 rads samples were 15.1 for gross alpha and 4.9 for combined radium (below 15.5 and 5.5). SDM 06/12/2017;
265	432	SFO	State Administrative/Compliance Order with penalty issued	22-AUG-2014	State	Presented draft AOC to board president and operators, PWS to respond to the Dept on terms SEH 7/5/14; AOC signed by board president on 8-13-14 and by John Madras on 8/22/14, fully effective 8-22-14, Changed enforcement action status to taken and generated compliance schedule. The AOC covers a period of 2 years and requires the PWS to solve Rads MCL's SEH 8/26/14; Associated new vio's to enf action SEH 9/18/15; AOC closed on 06/08/2017. PWS in compliance with rads. March 2017 rads samples were 15.1 for gross alpha and 4.9 for combined radium (below 15.5 and 5.5). SDM 06/12/2017;
265	418	SFO	State Administrative/Compliance Order with penalty issued	22-AUG-2014	State	Presented draft AOC to board president and operators, PWS to respond to the Dept on terms SEH 7/5/14; AOC signed by board president on 8-13-14 and by John Madras on 8/22/14, fully effective 8-22-14, Changed enforcement action status to taken and generated compliance schedule. The AOC covers a period of 2 years and requires the PWS to solve Rads MCL's SEH 8/26/14; Associated new vio's to enf action SEH 9/18/15; AOC closed on 06/08/2017. PWS in compliance with rads. March 2017 rads samples were 15.1 for gross alpha and 4.9 for combined radium (below 15.5 and 5.5). SDM 06/12/2017;
265	417	SFO	State Administrative/Compliance Order with penalty issued	22-AUG-2014	State	Presented draft AOC to board president and operators, PWS to respond to the Dept on terms SEH 7/5/14; AOC signed by board president on 8-13-14 and by John Madras on 8/22/14, fully effective 8-22-14, Changed enforcement action status to taken and generated compliance schedule. The AOC covers a period of 2 years and requires the PWS to solve Rads MCL's SEH 8/26/14; Associated new vio's to enf action SEH 9/18/15; AOC closed on 06/08/2017. PWS in compliance with rads. March 2017 rads samples were 15.1 for gross alpha and 4.9 for combined radium (below 15.5 and 5.5). SDM 06/12/2017;
265	415	SFO	State Administrative/Compliance Order with penalty issued	22-AUG-2014	State	Presented draft AOC to board president and operators, PWS to respond to the Dept on terms SEH 7/5/14; AOC signed by board president on 8-13-14 and by John Madras on 8/22/14, fully effective 8-22-14, Changed enforcement action status to taken and generated compliance schedule. The AOC covers a period of 2 years and requires the PWS to solve Rads MCL's SEH 8/26/14; Associated new vio's to enf action SEH 9/18/15; AOC closed on 06/08/2017. PWS in compliance with rads. March 2017 rads samples were 15.1 for gross alpha and 4.9 for combined radium (below 15.5 and 5.5). SDM 06/12/2017;
265	414	SFO	State Administrative/Compliance Order with penalty issued	22-AUG-2014	State	Presented draft AOC to board president and operators, PWS to respond to the Dept on terms SEH 7/5/14; AOC signed by board president on 8-13-14 and by John Madras on 8/22/14, fully effective 8-22-14, Changed enforcement action status to taken and generated compliance schedule. The AOC covers a period of 2 years and requires the PWS to solve Rads MCL's SEH 8/26/14; Associated new vio's to enf action SEH 9/18/15; AOC closed on 06/08/2017. PWS in compliance with rads. March 2017 rads samples were 15.1 for gross alpha and 4.9 for combined radium (below 15.5 and 5.5). SDM 06/12/2017;
265	411	SFO	State Administrative/Compliance Order with penalty issued	22-AUG-2014	State	Presented draft AOC to board president and operators, PWS to respond to the Dept on terms SEH 7/5/14; AOC signed by board president on 8-13-14 and by John Madras on 8/22/14, fully effective 8-22-14, Changed enforcement action status to taken and generated compliance schedule. The AOC covers a period of 2 years and requires the PWS to solve Rads MCL's SEH 8/26/14; Associated new vio's to enf action SEH 9/18/15; AOC closed on 06/08/2017. PWS in compliance with rads. March 2017 rads samples were 15.1 for gross alpha and 4.9 for combined radium (below 15.5 and 5.5). SDM 06/12/2017;
265	412	SFO	State Administrative/Compliance Order with penalty issued	22-AUG-2014	State	Presented draft AOC to board president and operators, PWS to respond to the Dept on terms SEH 7/5/14; AOC signed by board president on 8-13-14 and by John Madras on 8/22/14, fully effective 8-22-14, Changed enforcement action status to taken and generated compliance schedule. The AOC covers a period of 2 years and requires the PWS to solve Rads MCL's SEH 8/26/14; Associated new vio's to enf action SEH 9/18/15; AOC closed on 06/08/2017. PWS in compliance with rads. March 2017 rads samples were 15.1 for gross alpha and 4.9 for combined radium (below 15.5 and 5.5). SDM 06/12/2017;
265	413	SFO	State Administrative/Compliance Order with penalty issued	22-AUG-2014	State	Presented draft AOC to board president and operators, PWS to respond to the Dept on terms SEH 7/5/14; AOC signed by board president on 8-13-14 and by John Madras on 8/22/14, fully effective 8-22-14, Changed enforcement action status to taken and generated compliance schedule. The AOC covers a period of 2 years and requires the PWS to solve Rads MCL's SEH 8/26/14; Associated new vio's to enf action SEH 9/18/15; AOC closed on 06/08/2017. PWS in compliance with rads. March 2017 rads samples were 15.1 for gross alpha and 4.9 for combined radium (below 15.5 and 5.5). SDM 06/12/2017;
265	309	SFO	State Administrative/Compliance Order with penalty issued	22-AUG-2014	State	Presented draft AOC to board president and operators, PWS to respond to the Dept on terms SEH 7/5/14; AOC signed by board president on 8-13-14 and by John Madras on 8/22/14, fully effective 8-22-14, Changed enforcement action status to taken and generated compliance schedule. The AOC covers a period of 2 years and requires the PWS to solve Rads MCL's SEH 8/26/14; Associated new vio's to enf action SEH 9/18/15; AOC closed on 06/08/2017. PWS in compliance with rads. March 2017 rads samples were 15.1 for gross alpha and 4.9 for combined radium (below 15.5 and 5.5). SDM 06/12/2017;
266	209	SOX	State Compliance achieved	31-JUL-2014	State	RTC per EPA policy SEH 7/31/14;
252	429	SOX	State Compliance achieved	22-JAN-2014	State	-

1 - 33 of 33

All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
WELL #2 OLD WELL	105978	Yes	Well	Ground water	Emergency	Active
WELL #1	96952	Yes	Well	Ground water	Permanent	Active
DISTRIBUTION SYSTEM	99020	No	Distribution System/Zone	-	-	Active
TWO 20 HP PUMPS	109237	No	Pump Facility	-	-	Active
CHEMICAL SAMPLES	99021	No	Sampling Station	-	-	Active
140K GAL STANDPIPE	100414	No	Storage	-	-	Active
SET UP IN ERROR	105979	No	Storage	-	-	Inactive
SET UP IN ERROR	105980	No	Storage	-	-	Inactive
TREATMENT PLANT	99024	No	Treatment Plant	-	-	Active

1 - 9 of 9

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
TREATMENT PLANT	99024	4-Log Treatment of Viruses	Disinfection
TREATMENT PLANT	99024	Hypochlorination, Post	Disinfection
TREATMENT PLANT	99024	pH Adjustment, Post	Corrosion control
TREATMENT PLANT	99024	Reverse Osmosis	Radionuclides removal

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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