Is Quantico Marine Base-Mainside water safe to drink?

Quantico Marine Base-Mainside (PWS ID: VA6153675) has 204 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. EPA SDWIS lists this system's service population as 19,000 people using Surface Water sources.

How many people does Quantico Marine Base-Mainside serve?

EPA SDWIS reports that Quantico Marine Base-Mainside serves 19,000 people (this public water system's service population, not the municipal population of McIncr, McB Quantico or any other city). It is a Federal-owned system using Surface Water water sources with 1,314 service connections. The operator address is listed in McIncr, McB Quantico, Virginia.

What type of violations does Quantico Marine Base-Mainside have?

Quantico Marine Base-Mainside has 204 total violations: 109 health-based violations (MCL exceedances or treatment failures), 93 monitoring/reporting violations, and 5 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.

Has PFAS been detected in Quantico Marine Base-Mainside water?

No. Quantico Marine Base-Mainside was tested for PFAS under the EPA's UCMR5 monitoring program and no PFAS contamination was detected.

What water source does Quantico Marine Base-Mainside use?

Quantico Marine Base-Mainside uses Surface Water as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.

Where does this data come from?

All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.

Where does Quantico Marine Base-Mainside sit among U.S. public water systems?

According to EPA SDWIS population_served among sitemap-advertised systems (serving 500+), Quantico Marine Base-Mainside ranks #2,840 of 29,740 by people served, and #55 of 570 in Virginia. Ordinals use population_served DESC among systems serving 500+ (the sitemap cohort). See /methodology#corpus-placement.

How does Quantico Marine Base-Mainside's violation count compare nationally?

Quantico Marine Base-Mainside has 204 recorded EPA SDWIS violations, fewer than 14% of the 29,740 public water systems serving 500 or more people nationwide (the same sitemap cohort used for the corpus-placement ranking above). 86% of that cohort has fewer violations than Quantico Marine Base-Mainside. A system can have zero recorded violations and still be actively monitored, and a high violation count often reflects a system that reports thoroughly, not necessarily one with worse water.

States → Virginia

Community Water System · PWS VA6153675

Quantico Marine Base-Mainside

Operator location McIncr, McB Quantico, Virginia - 53% of 204 violations are health-based (upper-third health share (> 23%)); surface water source; 19,000 served per SDWIS.

Compiled by PlainWater · May 15, 2026

19,000
People served (this PWS) Larger third of systems: 204
EPA violations (this PWS) Upper third of systems: 109
Health-based (this PWS) Upper third by health-based share: No PFAS
UCMR5 (this PWS) Tested, none detected

Follow published updates (RSS)

Quantico Marine Base-Mainside standing, high SDWIS violation third

53% of 204 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 53% is upper-third health share (> 23%). UCMR5: UCMR5 tested, none detected. Population rank #2,840 of 29,740 among systems serving 500+.

The verdict

Quantico Marine Base-Mainside sits in the upper third of the sitemap cohort by violation count (204), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is large (19,000; larger served population (> 3,309)), so household exposure scale sits behind the violation mix. Health-based share is 53% - most of this ledger is MCL or treatment-technique exceedance. UCMR5 tested this system and reported no PFAS above the minimum reporting level.

#2,840 of 29,740
Population · /systems: #55 of 570
Population · VA: 204
Total EPA violations on record: 53%
Health-based (MCL / treatment failure)

Population ordinals match the sitemap cohort (systems serving 500+, population_served DESC). See methodology · corpus placement.

Water Safety Score

6/100

Quantico Marine Base-Mainside

Based on EPA SDWIS violation history and UCMR5 PFAS testing only, not water taste, odor, infrastructure age, or contaminants outside the federally tracked set.

Health-based violations F

109

EPA SDWIS health-based violations on record (MCL, MRDL, treatment technique)

Monitoring & reporting violations F

Non-health SDWIS violations (monitoring, reporting, and other compliance)

PFAS contamination N/A

Tested, none detected

Highest PFAS compound level detected in UCMR5 testing

System Details

System Type: Community
Owner Type: Federal
Connections: 1,314
County: Prince William
School/Daycare: No
MCL Violations: 104
Monitoring Violations: 93
Treatment Tech Violations: 5

Violation History

Contaminant violations recorded by EPA.

Contaminant	Category	Count	Latest
TTHM	MCL	49	2025
Total Haloacetic Acids (HAA5)	MCL	32	2018
Coliform (TCR)	MCL	23	2015
Barium	MR	8	2019
Interim Enhanced Surface Water Treatment Rule	MR	8	2015
Arsenic	MR	8	2019
Chromium	MR	8	2019
Selenium	MR	8	2019
Cadmium	MR	8	2019
Mercury	MR	8	2019
Antimony, Total	MR	6	2019
Beryllium, Total	MR	6	2019
CARBON, TOTAL	MR	6	2019
Nickel	MR	6	2019
Thallium, Total	MR	6	2019
Interim Enhanced Surface Water Treatment Rule	TT	5	2004
Lead and Copper Rule	MR	3	2018
Fluoride	MR	2	1984
Nitrate	MR	2	1984

Violation Count vs. the National Corpus

Quantico Marine Base-Mainside has 204 recorded EPA violations, 86% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 14% carry more. 53% of this system's own violations are health-based (109 of 204), and it ranks #2,840 of 29,740 by population served among that same cohort.

EPA violations vs. the national water-system corpus

Public water systems serving 500+ people (EPA SDWIS)

204 Higher than most more violations than 86% of 29,740 water systems

the national water-system corpus, bucketed by value

Each bar is a band; taller bars hold more water systems. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.

Source EPA SDWIS · 2026-05-15

How many violations vs. how serious, among peer systems

Quantico Marine Base-Mainside plotted against 29 peer public water systems (500+ people served), by total violation count (x) and the share of those violations that are health-based (y). The crosshair sits at this sample's own median on each axis. A high violation count does not automatically mean a serious record: most monitoring and reporting violations are minor, not health-based.

30 public water systems (500+ people served), EPA SDWIS current release.

How to read this

Each dot is one public water system; the highlighted dot is Quantico Marine Base-Mainside. A system to the right has more recorded violations; a system higher up has a larger share of those violations classified health-based rather than monitoring or reporting.

Rare but serious: few violations, but most of them are health-based.
Frequent, mostly paperwork: many violations, but mostly monitoring or reporting, not health-based.
Clean record: below-median on both counts, the tinted corner.

View all 30 systems as a list

City of Ballinger: 372 violations, 85% health-based
Quantico Marine Base-Mainside: 204 violations, 53% health-based (this system)
Nooksack Valley Water Association: 16 violations, 31% health-based
Montgomery Co RWD 12: 7 violations, 29% health-based
Irvin Water District #6: 11 violations, 27% health-based
Ticonderoga WD: 47 violations, 26% health-based
Pine Valley Plantation: 37 violations, 24% health-based
McLouth, City Of: 29 violations, 17% health-based
Kipling Oaks 1: 25 violations, 16% health-based
South Deerfield Water Supply District: 96 violations, 16% health-based
Sunset Ridge Water District: 82 violations, 15% health-based
Orange Water Dept: 136 violations, 14% health-based
Mount Pleasant Water Sys #1: 167 violations, 11% health-based
Lake Gibson Estates: 42 violations, 2% health-based
Benson Culinary Improvement District: 212 violations, 1% health-based
Conemaugh Twp Muni Auth: 567 violations, 1% health-based
Miccosukee Service Plaza: 0 violations, 0% health-based
Brazoria - Fort Bend Counties MUD 3: 0 violations, 0% health-based
Tanglewilde Thompson Place 600: 2 violations, 0% health-based
Center Water Co: 5 violations, 0% health-based
Spring Mills Elem School/Hvs: 9 violations, 0% health-based
Great Bend Industrial Park: 14 violations, 0% health-based
Glen Park Village: 19 violations, 0% health-based
Camp Is-Sho-Da: 22 violations, 0% health-based
Hamilton: 33 violations, 0% health-based
Town of Welaka: 54 violations, 0% health-based
Township of Blairstown Dpw: 61 violations, 0% health-based
McIntosh Water & Fire Pro Authority: 71 violations, 0% health-based
Clarkdale Municipal Water System: 114 violations, 0% health-based
Eureka Water Association: 273 violations, 0% health-based

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 107 samples detected PFAS.

Contaminant	Date	Result	MRL	Status
PFTA	7/9/2025	<8.00 ppt	8.00 ppt	Not Detected
PFTrDA	7/9/2025	<7.00 ppt	7.00 ppt	Not Detected
NEtFOSAA	7/9/2025	<5.00 ppt	5.00 ppt	Not Detected
NMeFOSAA	7/9/2025	<6.00 ppt	6.00 ppt	Not Detected
PFTA	7/9/2025	<8.00 ppt	8.00 ppt	Not Detected
NMeFOSAA	7/9/2025	<6.00 ppt	6.00 ppt	Not Detected
NEtFOSAA	7/9/2025	<5.00 ppt	5.00 ppt	Not Detected
PFTrDA	7/9/2025	<7.00 ppt	7.00 ppt	Not Detected
NMeFOSAA	4/16/2025	<6.00 ppt	6.00 ppt	Not Detected
NEtFOSAA	4/16/2025	<5.00 ppt	5.00 ppt	Not Detected
PFTrDA	4/16/2025	<7.00 ppt	7.00 ppt	Not Detected
PFTA	4/16/2025	<8.00 ppt	8.00 ppt	Not Detected
PFTA	4/16/2025	<8.00 ppt	8.00 ppt	Not Detected
PFTrDA	4/16/2025	<7.00 ppt	7.00 ppt	Not Detected
NMeFOSAA	4/16/2025	<6.00 ppt	6.00 ppt	Not Detected
NEtFOSAA	4/16/2025	<5.00 ppt	5.00 ppt	Not Detected
PFEESA	10/17/2024	<3.00 ppt	3.00 ppt	Not Detected
HFPO-DA	10/17/2024	<5.00 ppt	5.00 ppt	Not Detected
PFBA	10/17/2024	<5.00 ppt	5.00 ppt	Not Detected
6:2 FTS	10/17/2024	<5.00 ppt	5.00 ppt	Not Detected
4:2 FTS	10/17/2024	<3.00 ppt	3.00 ppt	Not Detected
8:2 FTS	10/17/2024	<5.00 ppt	5.00 ppt	Not Detected
PFMPA	10/17/2024	<4.00 ppt	4.00 ppt	Not Detected
PFHpS	10/17/2024	<3.00 ppt	3.00 ppt	Not Detected
PFMBA	10/17/2024	<3.00 ppt	3.00 ppt	Not Detected
NFDHA	10/17/2024	<20.00 ppt	20.00 ppt	Not Detected
PFPeS	10/17/2024	<4.00 ppt	4.00 ppt	Not Detected
11Cl-PF3OUdS	10/17/2024	<5.00 ppt	5.00 ppt	Not Detected
9Cl-PF3ONS	10/17/2024	<2.00 ppt	2.00 ppt	Not Detected
PFPeA	10/17/2024	<3.00 ppt	3.00 ppt	Not Detected
PFTrDA	10/17/2024	<7.00 ppt	7.00 ppt	Not Detected
ADONA	10/17/2024	<3.00 ppt	3.00 ppt	Not Detected
NEtFOSAA	10/17/2024	<5.00 ppt	5.00 ppt	Not Detected
PFTA	10/17/2024	<8.00 ppt	8.00 ppt	Not Detected
PFBS	10/17/2024	<3.00 ppt	3.00 ppt	Not Detected
PFHpA	10/17/2024	<3.00 ppt	3.00 ppt	Not Detected
PFHxS	10/17/2024	<3.00 ppt	3.00 ppt	Not Detected
PFOS	10/17/2024	<4.00 ppt	4.00 ppt	Not Detected
PFOA	10/17/2024	<4.00 ppt	4.00 ppt	Not Detected
PFDA	10/17/2024	<3.00 ppt	3.00 ppt	Not Detected
PFDoA	10/17/2024	<3.00 ppt	3.00 ppt	Not Detected
PFHxA	10/17/2024	<3.00 ppt	3.00 ppt	Not Detected
PFNA	10/17/2024	<4.00 ppt	4.00 ppt	Not Detected
PFUnA	10/17/2024	<2.00 ppt	2.00 ppt	Not Detected
NMeFOSAA	10/17/2024	<6.00 ppt	6.00 ppt	Not Detected
PFMBA	10/17/2024	<3.00 ppt	3.00 ppt	Not Detected
NMeFOSAA	10/17/2024	<6.00 ppt	6.00 ppt	Not Detected
NEtFOSAA	10/17/2024	<5.00 ppt	5.00 ppt	Not Detected
PFTrDA	10/17/2024	<7.00 ppt	7.00 ppt	Not Detected
PFTA	10/17/2024	<8.00 ppt	8.00 ppt	Not Detected

Health-based violations on Quantico Marine Base-Mainside

109 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for VA6153675.

EPA SDWIS · PWS VA6153675 VA primacy agency

Sources: EPA SDWIS · Virginia Department of Health, Office of Drinking Water

Nationwide peers

204 violations · 19,000 served: nearest cross-state SDWIS matches.

Cross-state systems with comparable violation load

Nearest cross-state community systems (500+ served) by total SDWIS violations on record.

4 peers

Cross-state systems with similar served population

Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).

4 peers

What to do with Quantico Marine Base-Mainside

Use this system's EPA-reported record as a starting filter, not a final verdict.

See how every tracked system in Virginia compares on the same EPA violation measures. Virginia systems
Check whether PFAS was detected at this system under UCMR5 testing. PFAS guide
Find and compare another public water system by name or PWSID. Search systems

EPA SDWIS and UCMR5 figures are informational only, not a substitute for a certified lab test of your own tap water.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater

Compiled by PlainWater, Drinking Water Quality Editorial Process · May 15, 2026

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.