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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.

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Violations

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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 of Treatment (SWTR-Unfilt/GWR)	Ground Water Rule	Groundwater Rule	2220	Returned to Compliance	01-JUN-2025	30-JUN-2025	No
MON	Monitoring, Routine (RTCR)	Revised Total Coliform Rule	Revised Total Coliform Rule	2217	Returned to Compliance	01-JUN-2021	30-JUN-2021	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	2108	Returned to Compliance	01-SEP-2007	30-SEP-2007	Yes
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	197	Returned to Compliance	01-DEC-1996	31-DEC-1996	Yes

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Enforcement Actions

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Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
1631	2220	SOX	State Compliance achieved	03-SEP-2025	State	RTC per EPA policy. Alan M., 9/3/25
1624	2217	SIF	State Public Notification received	22-JUL-2022	State	-
1620	197	SOX	State Compliance achieved	05-FEB-2015	State	-
1609	2108	SOX	State Compliance achieved	22-JAN-2014	State	-

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All Facilities

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Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
CC 2 ST LOUIS CITY-HOWARD BEND MO6010715	95280	Yes	Consecutive Connection	Surface water	Permanent	Active
WELL A9 PURCHASED FROM MO6079507	99080	Yes	Well	Ground water	Permanent	Inactive
W4 HWY N	83677	Yes	Well	Ground water	Permanent	Inactive
WELL A7 PURCHASED FROM MO6079507	99079	Yes	Well	Ground water	Permanent	Active
WELL A4 1850 HWY 94 S DEFIANCE MO	99078	Yes	Well	Ground water	Permanent	Active
WELL A5 PURCHASED FROM MO6079507	99075	Yes	Well	Ground water	Permanent	Active
W6 LAURA HILLS	83679	Yes	Well	Ground water	Permanent	Active
W5 HWY N & Z	83678	Yes	Well	Ground water	Permanent	Active
WELL #9A	109065	Yes	Well	Ground water	Permanent	Active
WELL #8A	106749	Yes	Well	Ground water	Permanent	Active
WELL #6A	106748	Yes	Well	Ground water	Permanent	Active
WELL A12 HWY 94 DEFIANCE 3A	105681	Yes	Well	Ground water	Permanent	Active
WELL A11 HWY 94 DEFIANCE 2A	105680	Yes	Well	Ground water	Permanent	Active
WELL A1 PURCHASED FROM MO6079507	99081	Yes	Well	Ground water	Other	Inactive
WELL A8 2050 HWY 94 S DEFIANCE MO	99077	Yes	Well	Ground water	Other	Inactive
WELL A6 1950 HWY 94 S DEFIANCE MO	99076	Yes	Well	Ground water	Other	Inactive
WELL A3 1800 HWY 94 S DEFIANCE MO	99074	Yes	Well	Ground water	Other	Inactive
WELL A2 1750 HWY 94 S-DEFIANCE MO	99073	Yes	Well	Ground water	Other	Inactive
W3 LAKE ST LOUI	83676	Yes	Well	Ground water	Other	Inactive
W1 NEW MELLE	83674	Yes	Well	Ground water	Other	Inactive
WELL # 8	83681	Yes	Well	Ground water	Emergency	Active
W7 HAWK RIDGE	83680	Yes	Well	Ground water	Emergency	Active
W2 FEISE RD	83675	Yes	Well	Ground water	Emergency	Active
CC 1 ST CHARLES COMO6079507	85081	Yes	Consecutive Connection	Ground water	Permanent	Inactive
DISTRIBUTION SYSTEM	88096	No	Distribution System/Zone	-	-	Active
DANIEL BOONE BOOSTER PUMP STATION	105468	No	Pump Facility	-	-	Active
CHARLEMAGNE BOOSTER PUMP STATION	105469	No	Pump Facility	-	-	Active
FEISE ROAD BOOSTER PUMP STATION	105470	No	Pump Facility	-	-	Active
HIGHWAY Z BOOSTER PUMP STATION	105471	No	Pump Facility	-	-	Active
HOLT ROAD BOOSTER PUMP STATION	105472	No	Pump Facility	-	-	Active
ARMY BOOSTER PUMP STATION	105473	No	Pump Facility	-	-	Active
HIDDEN CEDAR BOOSTER STATION	106802	No	Pump Facility	-	-	Active
WSTA BOOSTER STATION	106803	No	Pump Facility	-	-	Active
CALLAWAY BOOSTER STATION	106804	No	Pump Facility	-	-	Active
MATSON BOOSTER STATION	106805	No	Pump Facility	-	-	Active
HIGHWAY N BOOSTER PUMP STATION	95821	No	Pump Facility	-	-	Active
CHEMICAL SAMPLES	92949	No	Sampling Station	-	-	Active
7M GAL GROUND STORAGE WATER PLANT	105461	No	Storage	-	-	Active
3M GAL PILLAR TOWER HWY 40 (OFFICE)	105462	No	Storage	-	-	Active
2M GAL TOWER DANIEL BOONE	105463	No	Storage	-	-	Active
1M GAL PILLAR TANK NEW MELLE	105464	No	Storage	-	-	Active
100K GAL ELEVATED TANK HWY D	105465	No	Storage	-	-	Active
100K GAL ELEVATED TANK WESTWOOD TRAILS	105466	No	Storage	-	-	Active
400K GAL ELEVATED TANK ARMY AREA	105467	No	Storage	-	-	Active
700K CLEARWELL	106806	No	Storage	-	-	Active
2MG TOWER LAURA HILL RD	77014	No	Storage	-	-	Active
1M GAL TOWER HIGHWAY N & Z	97206	No	Storage	-	-	Active
1 M GAL STANDPIPE FREIS RD	97207	No	Storage	-	-	Active
1MG STANDPIPE CHARLEMAGNE RD	97208	No	Storage	-	-	Active
AKA ST 63756 (MOVED TO MO602531)	97205	No	Storage	-	-	Inactive

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Treatment Processes

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Facility Name	Facility ID	Treatment Process	Treatment Objective
W3 LAKE ST LOUI	73111	Gaseous Chlorination, Post	Disinfection
W3 LAKE ST LOUI	73111	Sequestration	Iron removal
W6 LAURA HILLS	73114	Hypochlorination, Post	Disinfection
W7 HAWK RIDGE	73115	Hypochlorination, Post	Disinfection
W2 FEISE RD	95127	Hypochlorination, Post	Disinfection
W5 HWY N & Z	95128	Hypochlorination, Post	Disinfection
W5 HWY N & Z	95128	Sequestration	Iron removal
TRTMT PLT-BOUGHT FROM MO6079507	97459	4-Log Treatment of Viruses	Disinfection
TRTMT PLT-BOUGHT FROM MO6079507	97459	Hypochlorination, Post	Disinfection
TRTMT PLT-BOUGHT FROM MO6079507	97459	Filtration, Rapid Sand	Particulate removal
TRTMT PLT-BOUGHT FROM MO6079507	97459	Aeration, Diffused	Taste / odor control
TRTMT PLT-BOUGHT FROM MO6079507	97459	Lime - Soda Ash Addition	Softening (hardness removal)
TRTMT PLT-BOUGHT FROM MO6079507	97459	Rapid Mix	Softening (hardness removal)
TRTMT PLT-BOUGHT FROM MO6079507	97459	Fluoridation	Other

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