Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	MS0230001
PWS Name	CITY OF BAY ST LOUIS
PWS Type	Community water system
Owner Type	Local government
Primary Source	Ground water
Primacy Type	State
Is Wholesaler?	No
Population Served	9284
County Served	Hancock

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	37296	Returned to Compliance	07-DEC-2024	-	No
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	37293	Returned to Compliance	01-OCT-2024	31-DEC-2024	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	37292	Returned to Compliance	01-JUL-2024	30-SEP-2024	Yes
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	37295	Returned to Compliance	27-MAY-2024	-	No
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	37291	Returned to Compliance	01-APR-2024	30-JUN-2024	Yes
Other	Consumer Confidence Report Inadequate Reporting	Consumer Confidence Rule	Consumer Confidence Rule	37288	Returned to Compliance	01-JUL-2023	-	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	37294	Returned to Compliance	04-JUN-2023	-	No
Other	Public Notification Violation for NPDWR Violation	Public Notice Rule and Revised PN Rule	Public Notice	37297	Returned to Compliance	10-MAR-2023	-	No
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	37287	Returned to Compliance	01-JAN-2023	31-MAR-2023	Yes
MCL	Maximum Contaminant Level Violation, Average	Stage 2 Disinfectants and Disinfection Byproducts Rule	TTHM	37286	Returned to Compliance	01-OCT-2022	31-DEC-2022	Yes
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Chlorine	37278	Returned to Compliance	01-OCT-2018	31-DEC-2018	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Combined Uranium	37262	Returned to Compliance	01-OCT-2012	31-DEC-2012	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Radium-228	37267	Returned to Compliance	01-OCT-2012	31-DEC-2012	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Radium-228	37269	Returned to Compliance	01-OCT-2012	31-DEC-2012	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Radium-228	37268	Returned to Compliance	01-OCT-2012	31-DEC-2012	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Radium-226	37265	Returned to Compliance	01-OCT-2012	31-DEC-2012	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Radium-226	37264	Returned to Compliance	01-OCT-2012	31-DEC-2012	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Radium-226	37266	Returned to Compliance	01-OCT-2012	31-DEC-2012	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Combined Uranium	37263	Returned to Compliance	01-OCT-2012	31-DEC-2012	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Radium-226	37261	Returned to Compliance	01-JUL-2012	30-SEP-2012	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Radium-228	37254	Returned to Compliance	01-JUL-2012	30-SEP-2012	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Radium-228	37255	Returned to Compliance	01-JUL-2012	30-SEP-2012	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Radium-228	37253	Returned to Compliance	01-JUL-2012	30-SEP-2012	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Radium-226	37259	Returned to Compliance	01-JUL-2012	30-SEP-2012	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Radium-226	37260	Returned to Compliance	01-JUL-2012	30-SEP-2012	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Combined Uranium	37245	Returned to Compliance	01-APR-2012	30-JUN-2012	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Radium-228	37247	Returned to Compliance	01-APR-2012	30-JUN-2012	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Combined Uranium	37249	Returned to Compliance	01-APR-2012	30-JUN-2012	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Combined Uranium	37241	Returned to Compliance	01-APR-2012	30-JUN-2012	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Radium-226	37246	Returned to Compliance	01-APR-2012	30-JUN-2012	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Radium-226	37250	Returned to Compliance	01-APR-2012	30-JUN-2012	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Radium-226	37242	Returned to Compliance	01-APR-2012	30-JUN-2012	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Radium-228	37243	Returned to Compliance	01-APR-2012	30-JUN-2012	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Radium-228	37251	Returned to Compliance	01-APR-2012	30-JUN-2012	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Combined Uranium	37236	Returned to Compliance	01-JAN-2012	31-MAR-2012	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Combined Uranium	37232	Returned to Compliance	01-JAN-2012	31-MAR-2012	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Radium-226	37229	Returned to Compliance	01-JAN-2012	31-MAR-2012	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Radium-226	37237	Returned to Compliance	01-JAN-2012	31-MAR-2012	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Combined Uranium	37228	Returned to Compliance	01-JAN-2012	31-MAR-2012	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Radium-228	37238	Returned to Compliance	01-JAN-2012	31-MAR-2012	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Radium-228	37230	Returned to Compliance	01-JAN-2012	31-MAR-2012	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Radium-228	37234	Returned to Compliance	01-JAN-2012	31-MAR-2012	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Radium-226	37233	Returned to Compliance	01-JAN-2012	31-MAR-2012	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Combined Uranium	37224	Returned to Compliance	01-OCT-2011	31-DEC-2011	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Radium-226	37217	Returned to Compliance	01-OCT-2011	31-DEC-2011	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Radium-226	37221	Returned to Compliance	01-OCT-2011	31-DEC-2011	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Radium-226	37225	Returned to Compliance	01-OCT-2011	31-DEC-2011	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Combined Uranium	37220	Returned to Compliance	01-OCT-2011	31-DEC-2011	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Radium-228	37226	Returned to Compliance	01-OCT-2011	31-DEC-2011	No
MR	Monitoring, Regular	Radionuclides and Revised Rad Rule	Radium-228	37218	Returned to Compliance	01-OCT-2011	31-DEC-2011	No

1 - 50 of 201

Enforcement Actions

Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
80	37297	SO+	State no additional Formal Action needed	15-SEP-2025	State	-
55	37286	SIF	State Public Notification received	29-APR-2025	State	-
78	37287	SOX	State Compliance achieved	25-FEB-2025	State	-
78	37291	SOX	State Compliance achieved	25-FEB-2025	State	-
78	37292	SOX	State Compliance achieved	25-FEB-2025	State	-
78	37293	SOX	State Compliance achieved	25-FEB-2025	State	-
77	37288	SO+	State no additional Formal Action needed	27-JAN-2025	State	-
75	37295	SO+	State no additional Formal Action needed	17-JAN-2025	State	-
76	37294	SO+	State no additional Formal Action needed	17-JAN-2025	State	-
74	37296	SO+	State no additional Formal Action needed	17-JAN-2025	State	-
52	37278	SOX	State Compliance achieved	31-MAR-2019	State	-
48	37245	SIF	State Public Notification received	06-JUN-2013	State	-
48	37246	SIF	State Public Notification received	06-JUN-2013	State	-
48	37247	SIF	State Public Notification received	06-JUN-2013	State	-
48	37249	SIF	State Public Notification received	06-JUN-2013	State	-
48	37250	SIF	State Public Notification received	06-JUN-2013	State	-
48	37251	SIF	State Public Notification received	06-JUN-2013	State	-
48	37253	SIF	State Public Notification received	06-JUN-2013	State	-
48	37254	SIF	State Public Notification received	06-JUN-2013	State	-
48	37255	SIF	State Public Notification received	06-JUN-2013	State	-
48	37259	SIF	State Public Notification received	06-JUN-2013	State	-
48	37260	SIF	State Public Notification received	06-JUN-2013	State	-
48	37261	SIF	State Public Notification received	06-JUN-2013	State	-
48	37262	SIF	State Public Notification received	06-JUN-2013	State	-
48	37263	SIF	State Public Notification received	06-JUN-2013	State	-
48	37264	SIF	State Public Notification received	06-JUN-2013	State	-
48	37265	SIF	State Public Notification received	06-JUN-2013	State	-
48	37266	SIF	State Public Notification received	06-JUN-2013	State	-
48	37267	SIF	State Public Notification received	06-JUN-2013	State	-
48	37268	SIF	State Public Notification received	06-JUN-2013	State	-
48	37269	SIF	State Public Notification received	06-JUN-2013	State	-
48	37243	SIF	State Public Notification received	06-JUN-2013	State	-
48	37242	SIF	State Public Notification received	06-JUN-2013	State	-
48	37241	SIF	State Public Notification received	06-JUN-2013	State	-
48	37238	SIF	State Public Notification received	06-JUN-2013	State	-
48	37237	SIF	State Public Notification received	06-JUN-2013	State	-
48	37236	SIF	State Public Notification received	06-JUN-2013	State	-
48	37234	SIF	State Public Notification received	06-JUN-2013	State	-
48	37233	SIF	State Public Notification received	06-JUN-2013	State	-
48	37232	SIF	State Public Notification received	06-JUN-2013	State	-
48	37230	SIF	State Public Notification received	06-JUN-2013	State	-
48	37228	SIF	State Public Notification received	06-JUN-2013	State	-
48	37229	SIF	State Public Notification received	06-JUN-2013	State	-
2	37179	SOX	State Compliance achieved	31-MAR-2013	State	-
2	37178	SOX	State Compliance achieved	31-MAR-2013	State	-
3	37186	SOX	State Compliance achieved	31-MAR-2013	State	-
3	37187	SOX	State Compliance achieved	31-MAR-2013	State	-
3	37188	SOX	State Compliance achieved	31-MAR-2013	State	-
6	37202	SOX	State Compliance achieved	31-MAR-2013	State	-
4	37204	SOX	State Compliance achieved	31-MAR-2013	State	-

1 - 50 of 201

All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
WELL WL002	34825	Yes	Well	Ground water	Interim	Inactive
WELL WL005	34828	Yes	Well	Ground water	Permanent	Active
WELL WL004	34827	Yes	Well	Ground water	Permanent	Active
WELL WL003	34826	Yes	Well	Ground water	Permanent	Active
WELL WL001	34824	Yes	Well	Ground water	Permanent	Active
DISTRIBUTION DS000	37839	No	Distribution System/Zone	-	-	Active
IDSE	40064	No	Distribution System/Zone	-	-	Active
250K ELEVATED TANK ON WASHINGTON ST.	41298	No	Storage	-	-	Active
250K ELEVATED TANK AT WELL #3	41299	No	Storage	-	-	Active
TREATMENT FACILITY TF101	32006	No	Treatment Plant	-	-	Active
TREATMENT FACILITY TF103	32007	No	Treatment Plant	-	-	Active
TREATMENT FACILITY TF104	32008	No	Treatment Plant	-	-	Active
TREATMENT FACILITY TF105	32009	No	Treatment Plant	-	-	Active
TREATMENT FACILITY TF102	33827	No	Treatment Plant	-	-	Inactive

1 - 14 of 14

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
TREATMENT FACILITY TF101	32006	Inhibitor, Polyphosphate	Corrosion control
TREATMENT FACILITY TF101	32006	Gaseous Chlorination, Post	Disinfection
TREATMENT FACILITY TF101	32006	Fluoridation	Other
TREATMENT FACILITY TF103	32007	Gaseous Chlorination, Post	Disinfection
TREATMENT FACILITY TF103	32007	Fluoridation	Other
TREATMENT FACILITY TF104	32008	Inhibitor, Polyphosphate	Corrosion control
TREATMENT FACILITY TF104	32008	Gaseous Chlorination, Post	Disinfection
TREATMENT FACILITY TF104	32008	Fluoridation	Other
TREATMENT FACILITY TF105	32009	Inhibitor, Polyphosphate	Corrosion control
TREATMENT FACILITY TF105	32009	Gaseous Chlorination, Post	Disinfection
TREATMENT FACILITY TF105	32009	Fluoridation	Other

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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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