Safe Drinking Water Information System (SDWIS) Federal Reporting Services

Your Drinking Water Query results from SDWIS Fed Reporting Services

PWS ID	MD0180022
PWS Name	PATUXENT NAVAL AIR STATION (NAVFAC-WASH)
PWS Type	Community water system
Owner Type	Federal government
Primary Source	Ground water
Primacy Type	State
Is Wholesaler?	No
Population Served	22000
County Served	St. Mary's

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	TTHM	48	Returned to Compliance	01-JUN-2023	31-AUG-2023	No
MR	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	Lead and Copper Rule	47	Returned to Compliance	01-OCT-2022	-	No
MR	Monitoring, Regular	Nitrate Rule	Nitrate	45	Returned to Compliance	01-JAN-2022	31-DEC-2022	No
MR	Monitoring, Regular	Inorganic Chemicals	Nickel	40	Known	01-JAN-2020	31-DEC-2022	No
MR	Monitoring, Regular	Inorganic Chemicals	Mercury	39	Known	01-JAN-2020	31-DEC-2022	No
MR	Monitoring, Regular	Inorganic Chemicals	Cadmium	37	Known	01-JAN-2020	31-DEC-2022	No
MR	Monitoring, Regular	Inorganic Chemicals	Selenium	44	Known	01-JAN-2020	31-DEC-2022	No
MR	Monitoring, Regular	Inorganic Chemicals	Antimony, Total	41	Known	01-JAN-2020	31-DEC-2022	No
MR	Monitoring, Regular	Inorganic Chemicals	Beryllium, Total	42	Known	01-JAN-2020	31-DEC-2022	No
MR	Monitoring, Regular	Inorganic Chemicals	Thallium, Total	43	Known	01-JAN-2020	31-DEC-2022	No
MR	Monitoring, Regular	Inorganic Chemicals	Chromium	38	Known	01-JAN-2020	31-DEC-2022	No
MR	Monitoring, Regular	Inorganic Chemicals	Fluoride	46	Returned to Compliance	01-JAN-2020	31-DEC-2022	No
MR	Monitoring, Regular	Inorganic Chemicals	Barium	36	Known	01-JAN-2020	31-DEC-2022	No
MR	Monitoring, Regular	Arsenic Rule	Arsenic	32	Returned to Compliance	01-OCT-2011	31-DEC-2011	No
MR	Monitoring, Regular	Arsenic Rule	Arsenic	25	Returned to Compliance	01-APR-2011	30-JUN-2011	No
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	29	Returned to Compliance	01-JUL-2010	30-SEP-2010	No
MR	Monitoring, Routine Minor (TCR)	Total Coliform Rule	Coliform (TCR)	26	Returned to Compliance	01-JAN-2010	31-JAN-2010	No
MR	Monitoring, Regular	Nitrate Rule	Nitrate	27	Returned to Compliance	01-JAN-2010	31-DEC-2010	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	31	Returned to Compliance	01-MAY-2009	31-MAY-2009	No
MR	Monitoring, Routine Major (TCR)	Total Coliform Rule	Coliform (TCR)	30	Returned to Compliance	01-APR-2009	30-APR-2009	No
MR	Monitoring, Regular	Nitrate Rule	Nitrate	24	Returned to Compliance	01-JAN-2009	31-DEC-2009	No
MR	Monitoring, Regular	Inorganic Chemicals	Antimony, Total	20	Returned to Compliance	01-JAN-2008	31-DEC-2008	No
MR	Monitoring, Regular	Inorganic Chemicals	Selenium	23	Returned to Compliance	01-JAN-2008	31-DEC-2008	No
MR	Monitoring, Regular	Inorganic Chemicals	Nickel	19	Returned to Compliance	01-JAN-2008	31-DEC-2008	No
MR	Monitoring, Regular	Inorganic Chemicals	Beryllium, Total	21	Returned to Compliance	01-JAN-2008	31-DEC-2008	No
MR	Monitoring, Regular	Inorganic Chemicals	Thallium, Total	22	Returned to Compliance	01-JAN-2008	31-DEC-2008	No
MR	Monitoring, Regular	Inorganic Chemicals	Chromium	17	Returned to Compliance	01-JAN-2008	31-DEC-2008	No
MR	Monitoring, Regular	Inorganic Chemicals	Barium	15	Returned to Compliance	01-JAN-2008	31-DEC-2008	No
MR	Monitoring, Regular	Inorganic Chemicals	Fluoride	28	Returned to Compliance	01-JAN-2008	31-DEC-2010	No
MR	Monitoring, Regular	Inorganic Chemicals	Mercury	18	Returned to Compliance	01-JAN-2008	31-DEC-2008	No
MR	Monitoring, Regular	Inorganic Chemicals	Cadmium	16	Returned to Compliance	01-JAN-2008	31-DEC-2008	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	TTHM	14	Returned to Compliance	01-JUL-2004	30-SEP-2004	No
MR	Monitoring and Reporting (DBP)	Stage 1 Disinfectants and Disinfection Byproducts Rule	Total Haloacetic Acids (HAA5)	13	Returned to Compliance	01-JUL-2004	30-SEP-2004	No
MCL	Maximum Contaminant Level Violation, Monthly (TCR)	Total Coliform Rule	Coliform (TCR)	1	Returned to Compliance	01-FEB-2000	29-FEB-2000	Yes
MR	Monitoring, Regular	Nitrate Rule	Nitrate	12	Returned to Compliance	01-JAN-1998	31-DEC-1998	No
MR	Monitoring, Regular	Inorganic Chemicals	Mercury	5	Returned to Compliance	01-JAN-1996	31-DEC-1998	No
MR	Monitoring, Regular	Inorganic Chemicals	Cadmium	3	Returned to Compliance	01-JAN-1996	31-DEC-1998	No
MR	Monitoring, Regular	Inorganic Chemicals	Barium	2	Returned to Compliance	01-JAN-1996	31-DEC-1998	No
MR	Monitoring, Regular	Arsenic Rule	Arsenic	11	Returned to Compliance	01-JAN-1996	31-DEC-1998	No
MR	Monitoring, Regular	Inorganic Chemicals	Chromium	99V0003	Known	01-JAN-1996	31-DEC-1998	No
MR	Monitoring, Regular	Inorganic Chemicals	Thallium, Total	99V0009	Known	01-JAN-1996	31-DEC-1998	No
MR	Monitoring, Regular	Inorganic Chemicals	Beryllium, Total	99V0008	Known	01-JAN-1996	31-DEC-1998	No
MR	Monitoring, Regular	Inorganic Chemicals	Antimony, Total	99V0007	Known	01-JAN-1996	31-DEC-1998	No
MR	Monitoring, Regular	Inorganic Chemicals	Selenium	99V0006	Known	01-JAN-1996	31-DEC-1998	No
MR	Monitoring, Regular	Inorganic Chemicals	Nickel	99V0005	Known	01-JAN-1996	31-DEC-1998	No
MR	Monitoring, Regular	Inorganic Chemicals	Mercury	99V0004	Known	01-JAN-1996	31-DEC-1998	No
MR	Monitoring, Regular	Inorganic Chemicals	Cadmium	99V0002	Known	01-JAN-1996	31-DEC-1998	No
MR	Monitoring, Regular	Inorganic Chemicals	Antimony, Total	7	Returned to Compliance	01-JAN-1996	31-DEC-1998	No
MR	Monitoring, Regular	Inorganic Chemicals	Beryllium, Total	8	Returned to Compliance	01-JAN-1996	31-DEC-1998	No
MR	Monitoring, Regular	Inorganic Chemicals	Thallium, Total	9	Returned to Compliance	01-JAN-1996	31-DEC-1998	No

1 - 50 of 57

Enforcement Actions

Latest Enforcement ID	Associated To Violation ID	Enforcement Action Type Code	Enforcement Action Description	Enforcement Date	Originator Description	Enforcement Comment
85	48	SIF	State Public Notification received	27-JUN-2024	State	-
76	46	SIF	State Public Notification received	31-OCT-2023	State	-
75	45	SIF	State Public Notification received	31-OCT-2023	State	-
74	47	SOX	State Compliance achieved	11-JAN-2023	State	M&R violation - late report and late samples (2 out of 30 samples) collected late (i.e., >9/30/2022 for June - Sept. 2022 MP).
59	32	SOX	State Compliance achieved	04-MAY-2012	State	ENFORCEMENTID :1254948;
58	25	SOX	State Compliance achieved	10-AUG-2011	State	ENFORCEMENTID :1152646;
56	27	SOX	State Compliance achieved	11-FEB-2011	State	ENFORCEMENTID :1151182;
57	28	SOX	State Compliance achieved	11-FEB-2011	State	ENFORCEMENTID :1151186;
27	15	SOX	State Compliance achieved	31-JAN-2011	State	ENFORCEMENTID :1151123;
27	16	SOX	State Compliance achieved	31-JAN-2011	State	ENFORCEMENTID :1151123;
27	18	SOX	State Compliance achieved	31-JAN-2011	State	ENFORCEMENTID :1151123;
27	19	SOX	State Compliance achieved	31-JAN-2011	State	ENFORCEMENTID :1151123;
27	20	SOX	State Compliance achieved	31-JAN-2011	State	ENFORCEMENTID :1151123;
27	21	SOX	State Compliance achieved	31-JAN-2011	State	ENFORCEMENTID :1151123;
27	22	SOX	State Compliance achieved	31-JAN-2011	State	ENFORCEMENTID :1151123;
27	23	SOX	State Compliance achieved	31-JAN-2011	State	ENFORCEMENTID :1151123;
27	17	SOX	State Compliance achieved	31-JAN-2011	State	ENFORCEMENTID :1151123;
55	29	SOX	State Compliance achieved	22-OCT-2010	State	ENFORCEMENTID :1150261;
54	26	SOX	State Compliance achieved	11-MAR-2010	State	ENFORCEMENTID :1047617;
53	24	SOX	State Compliance achieved	01-FEB-2010	State	ENFORCEMENTID :1047130; ORIGINAL REPORT HAD A DATA ENTRY ERROR.
52	31	SOX	State Compliance achieved	25-JUN-2009	State	ENFORCEMENTID :0944652; LATE REPORT
51	30	SOX	State Compliance achieved	19-MAY-2009	State	ENFORCEMENTID :0944281; LATE REPORT
21	13	SOX	State Compliance achieved	10-NOV-2004	State	ENFORCEMENTID :0533320;
22	14	SOX	State Compliance achieved	10-NOV-2004	State	ENFORCEMENTID :0533320;
15	1	SIF	State Public Notification received	24-FEB-2000	State	ENFORCEMENTID :0018998;
3	7	SIF	State Public Notification received	11-MAR-1999	State	ENFORCEMENTID :9915146;
3	2	SIF	State Public Notification received	11-MAR-1999	State	ENFORCEMENTID :9915146;
3	3	SIF	State Public Notification received	11-MAR-1999	State	ENFORCEMENTID :9915146;
14	12	SIF	State Public Notification received	11-MAR-1999	State	ENFORCEMENTID :9915146;
13	11	SIF	State Public Notification received	11-MAR-1999	State	ENFORCEMENTID :9915146;
3	10	SIF	State Public Notification received	11-MAR-1999	State	ENFORCEMENTID :9915146;
3	9	SIF	State Public Notification received	11-MAR-1999	State	ENFORCEMENTID :9915146;
3	8	SIF	State Public Notification received	11-MAR-1999	State	ENFORCEMENTID :9915146;
3	6	SIF	State Public Notification received	11-MAR-1999	State	ENFORCEMENTID :9915146;
3	5	SIF	State Public Notification received	11-MAR-1999	State	ENFORCEMENTID :9915146;
3	4	SIF	State Public Notification received	11-MAR-1999	State	ENFORCEMENTID :9915146;
94E0001	94V0001	SOX	State Compliance achieved	22-AUG-1994	State	-
93E0001	93V0001	SOX	State Compliance achieved	10-AUG-1993	State	-
92E0002	92V0001	SIE	State Public Notification requested	16-DEC-1991	State	-

1 - 39 of 39

All Facilities

Facility Name	Facility ID	Is Source	Facility Type Description	Water Type Description	Availability Description	Facility Activity Status
USNAS 2Q BLDG 651 NOPERMIT	1810	Yes	Well	Ground water	Other	Inactive
USNAS SM023181	1828	Yes	Well	Ground water	Permanent	Inactive
USNAS SM032903	1827	Yes	Well	Ground water	Permanent	Inactive
USNAS SM690053	1826	Yes	Well	Ground water	Permanent	Inactive
USNAS 2100 (EMP) SM880946	1824	Yes	Well	Ground water	Permanent	Inactive
USNAS 2P NOPERMIT	1821	Yes	Well	Ground water	Permanent	Inactive
USNAS 1P BLDG 532B NOPERMIT	1820	Yes	Well	Ground water	Permanent	Inactive
USNAS 5A ABANDONED NOPERMIT	1818	Yes	Well	Ground water	Permanent	Inactive
USNAS 1H BLDG 1633 SM940074	1815	Yes	Well	Ground water	Permanent	Inactive
USNAS 1S BLDG 596 NOPERMIT	1814	Yes	Well	Ground water	Permanent	Inactive
USNAS 1R BLDG 536 NOPERMIT	1813	Yes	Well	Ground water	Permanent	Inactive
USNAS BLDG 2136 - FIRE SUPPRES SM813345	1812	Yes	Well	Ground water	Permanent	Inactive
USNAS BLDG 253 NOPERMIT	1808	Yes	Well	Ground water	Permanent	Inactive
USNAS 253A SM013246	1807	Yes	Well	Ground water	Permanent	Inactive
USNAS 1B BLDG 529 SM920358	1825	Yes	Well	Ground water	Permanent	Active
USNAS 4A BLDG 584 SM920369	1823	Yes	Well	Ground water	Permanent	Active
USNAS BLDG 532 SM943113	1822	Yes	Well	Ground water	Permanent	Active
USNAS 6B BLDG 527/671 NOPERMIT	1819	Yes	Well	Ground water	Permanent	Active
USNAS 5A BLDG 587 SM940410	1817	Yes	Well	Ground water	Permanent	Active
USNAS 3C BLDG 583 SM940411	1816	Yes	Well	Ground water	Permanent	Active
USNAS 1Q BLDG 617 SM920370	1809	Yes	Well	Ground water	Permanent	Active
USNAS 5B BLDG 590 SM930036	1806	Yes	Well	Ground water	Permanent	Active
USNAS 4C BLDG 2275 SM920643	1805	Yes	Well	Ground water	Permanent	Active
USNAS 1C BLDG 575 SM940926	1804	Yes	Well	Ground water	Permanent	Active
USNAS 2C BLDG 523 SM920245	1803	Yes	Well	Ground water	Permanent	Active
USNAS 3A BLDG 574 SM920357	1802	Yes	Well	Ground water	Permanent	Active
USNAS 4B BLDG 2276 SM920642	1801	Yes	Well	Ground water	Permanent	Active
USNAS 3B BLDG 531 NOPERMIT	1800	Yes	Well	Ground water	Permanent	Active
USNAS 2B BLDG 530 SM940925	1799	Yes	Well	Ground water	Permanent	Active
USNAS 2A BLDG 524 SM055823	1798	Yes	Well	Ground water	Permanent	Active
USNAS 1A BLDG 522 NOPERMIT	1797	Yes	Well	Ground water	Permanent	Active
USNAS QTRS X BLDG 966 SM003978	1811	Yes	Well	Ground water	Other	Inactive
BLDG 966 QTRS X	15784	No	Common Headers	-	-	Inactive
BLDG 1633 (WELL 1H) TRANSIENT	15785	No	Common Headers	-	-	Inactive
WELL 253	31122	No	Common Headers	-	-	Inactive
DISTRIBUTION SYSTEM	8851	No	Distribution System/Zone	-	-	Active
OTHE RSOURCES	99	No	Other	-	-	Inactive
STORAGE TANK	19140	No	Storage	-	-	Active
525 PUMPSTATION A (522+524)	26338	No	Treatment Plant	-	-	Active
BLDG 526 (530+531+2276)	26339	No	Treatment Plant	-	-	Active
BLDG 574 (WELL 3A)	26340	No	Treatment Plant	-	-	Active
BLDG 528 (WELL 1C 2C 4C)	26341	No	Treatment Plant	-	-	Active
BLDG 590 (WELL 5B)	26342	No	Treatment Plant	-	-	Active
OFFICERS CLUB (WELL 617-1Q)	26344	No	Treatment Plant	-	-	Active
BLDG 583 (WELL 3C)	26348	No	Treatment Plant	-	-	Active
BLDG 587 (WELL 5A)	26349	No	Treatment Plant	-	-	Active
BLDG 527 (WELL 6B)	26350	No	Treatment Plant	-	-	Active
BLDG 532 (WELL532B-1P)	26351	No	Treatment Plant	-	-	Active
BLDG 584 (WELL 4A)	26352	No	Treatment Plant	-	-	Active
BLDG 529 (WELL 1B)	26354	No	Treatment Plant	-	-	Active

1 - 50 of 57

Treatment Processes

Facility Name	Facility ID	Treatment Process	Treatment Objective
525 PUMPSTATION A (522+524)	26338	Hypochlorination, Post	Disinfection
BLDG 526 (530+531+2276)	26339	Hypochlorination, Post	Disinfection
BLDG 574 (WELL 3A)	26340	Hypochlorination, Post	Disinfection
BLDG 528 (WELL 1C 2C 4C)	26341	Hypochlorination, Post	Disinfection
BLDG 590 (WELL 5B)	26342	Hypochlorination, Post	Disinfection
WELL 253	26343	Hypochlorination, Post	Disinfection
OFFICERS CLUB (WELL 617-1Q)	26344	Hypochlorination, Post	Disinfection
WELL 2136-FIRE SUPRESSION	26345	Hypochlorination, Post	Disinfection
BLDG 536 (WELL 1R)	26346	Hypochlorination, Post	Disinfection
BLDG 596 (WELL 1S FIELD)	26347	Hypochlorination, Post	Disinfection
BLDG 583 (WELL 3C)	26348	Hypochlorination, Post	Disinfection
BLDG 587 (WELL 5A)	26349	Hypochlorination, Post	Disinfection
BLDG 527 (WELL 6B)	26350	Hypochlorination, Post	Disinfection
BLDG 532 (WELL532B-1P)	26351	Hypochlorination, Post	Disinfection
BLDG 584 (WELL 4A)	26352	Hypochlorination, Post	Disinfection
2100 TEST RANGE	26353	Hypochlorination, Post	Disinfection
BLDG 529 (WELL 1B)	26354	Hypochlorination, Post	Disinfection

1 - 17 of 17

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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