Is Mcb Quantico - Mainside Tap Water Safe? Quality Report

Water source: Surface water
Ownership: Federal government
Counties served: Prince William

Compliance record

Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.

114

health-based violations

207

violations on file

still open

Violation	Type	Status	Period
MCL	Health-based	Archived	2026-01-01 → 2026-03-31
MCL	Health-based	Archived	2025-10-01 → 2025-12-31
MCL	Health-based	Archived	2025-10-01 → 2025-12-31
MCL	Health-based	Archived	2025-10-01 → 2025-12-31
MCL	Health-based	Archived	2025-07-01 → 2025-09-30
MCL	Health-based	Archived	2025-07-01 → 2025-09-30
MCL	Health-based	Archived	2025-07-01 → 2025-09-30
MCL	Health-based	Archived	2025-04-01 → 2025-06-30
MCL	Health-based	Archived	2025-04-01 → 2025-06-30
MCL	Health-based	Archived	2025-04-01 → 2025-06-30

Other contaminants detected

Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the 95th percentile of this system's samples — over 100% is worth reading, but is not by itself a violation. Where a single sample came in higher than that percentile, it is noted under the bar. Formal violations are listed separately.

Contaminant	Level vs EPA limit	Detection rate	Source	Period
Trichloroacetic Acid	46.445 µg/L No EPA limit set worst single sample: 77.43 µg/L	136/136	SYR4	2012–2019
Bromodichloromethane	11.22 µg/L No EPA limit set worst single sample: 14 µg/L	135/135	SYR4	2012–2019
Chloroform	102.6 µg/L No EPA limit set worst single sample: 162 µg/L	135/135	SYR4	2012–2019
Dichloroacetic Acid	36.3915 µg/L No EPA limit set worst single sample: 89.2 µg/L	132/136	SYR4	2012–2019
TTHM	112 µg/L 140% of the EPA limit, at the 95th percentile of samples — 80 µg/L worst single sample: 168 µg/L	132/132	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	75.933 µg/L 127% of the EPA limit, at the 95th percentile of samples — 60 µg/L worst single sample: 110 µg/L	132/132	SYR4	2012–2019
Copper	630.3 µg/L 48% of the EPA limit 1300 µg/L worst single sample: 4743 µg/L	119/123	SYR4	2012–2019
Dibromochloromethane	2.3985 µg/L No EPA limit set worst single sample: 2.77 µg/L	54/139	SYR4	2012–2019
Monobromoacetic Acid	3.501 µg/L No EPA limit set worst single sample: 4.22 µg/L	47/136	SYR4	2012–2019
Monochloroacetic Acid	3.8475 µg/L No EPA limit set worst single sample: 4.46 µg/L	36/136	SYR4	2012–2019
Lead	18.99 µg/L 127% of the EPA limit, at the 95th percentile of samples — 15 µg/L worst single sample: 59 µg/L	32/127	SYR4	2012–2019
Lead	0.0020 mg/L 13% of the EPA limit 0.0150 mg/L	15/15	LCR	2025
Dibromoacetic Acid	3.8 µg/L No EPA limit set	10/136	SYR4	2012–2019
Fluoride	996.2 µg/L 25% of the EPA limit 4000 µg/L worst single sample: 1040 µg/L	7/7	SYR4	2012–2019
Barium	25 µg/L 1.3% of the EPA limit 2000 µg/L	6/6	SYR4	2012–2018
Bromoform	0.8000 µg/L No EPA limit set	4/139	SYR4	2012–2019
Beryllium, Total	1 µg/L 25% of the EPA limit 4 µg/L	1/6	SYR4	2012–2018
Nitrate-Nitrite	60 µg/L 0.6% of the EPA limit 10000 µg/L	1/7	SYR4	2012–2019

91 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalArsenicAtrazineBhc-GammaBenzeneBenzo(A)PyreneChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumCombined Radium (-226 And -228)Combined UraniumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebDiquatEthylene DibromideEndrinEthylbenzeneGross Alpha, Excl. Radon And UGross Beta Particle ActivityHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorNetfosaaNfdhaNmefosaaNitrateOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: GARDNER, OMAR
Phone: 703-432-0539
Email: [email protected]

Frequently asked questions about Mcb Quantico - Mainside

Is Mcb Quantico - Mainside tap water safe to drink?

EPA monitoring detected 18 contaminants in Mcb Quantico - Mainside's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.

What contaminants were detected in Mcb Quantico - Mainside's water?

EPA monitoring detected Trichloroacetic Acid, Bromodichloromethane, Chloroform, Dichloroacetic Acid, TTHM, and others. The full list with the level and data source for each is above.

How many people does Mcb Quantico - Mainside serve?

Mcb Quantico - Mainside reports serving 19,000 people in Virginia, per its EPA record.

Has Mcb Quantico - Mainside had any water quality violations?

The EPA has 207 violations on file for Mcb Quantico - Mainside, of which 114 are health-based (a contaminant limit or required treatment was breached) and 0 remain open. The rest are monitoring or reporting failures.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.