Question 1

Is Yorktown Naval Weapons Station water safe to drink?

Accepted Answer

Yorktown Naval Weapons Station (PWS ID: VA3199500) has 39 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. EPA SDWIS lists this system's service population as 2,386 people using Surface Water sources.

Question 2

How many people does Yorktown Naval Weapons Station serve?

Accepted Answer

EPA SDWIS reports that Yorktown Naval Weapons Station serves 2,386 people (this public water system's service population, not the municipal population of Yorktown or any other city). It is a Federal-owned system using Surface Water water sources with 445 service connections. The operator address is listed in Yorktown, Virginia.

Question 3

What type of violations does Yorktown Naval Weapons Station have?

Accepted Answer

Yorktown Naval Weapons Station has 39 total violations: 20 health-based violations (MCL exceedances or treatment failures), 18 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.

Question 4

Has PFAS been detected in Yorktown Naval Weapons Station water?

Accepted Answer

No PFAS testing data is available for Yorktown Naval Weapons Station under the EPA's UCMR5 monitoring program.

Question 5

What water source does Yorktown Naval Weapons Station use?

Accepted Answer

Yorktown Naval Weapons Station uses Surface Water as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.

Question 6

Where does this data come from?

Accepted Answer

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.

Question 7

Where does Yorktown Naval Weapons Station sit among U.S. public water systems?

Accepted Answer

According to EPA SDWIS population_served among sitemap-advertised systems (serving 500+), Yorktown Naval Weapons Station ranks #12,320 of 29,740 by people served, and #195 of 570 in Virginia. Ordinals use population_served DESC among systems serving 500+ (the sitemap cohort). See /methodology#corpus-placement.

Question 8

How does Yorktown Naval Weapons Station's violation count compare nationally?

Accepted Answer

Yorktown Naval Weapons Station has 39 recorded EPA SDWIS violations, fewer than 50% of the 29,740 public water systems serving 500 or more people nationwide (the same sitemap cohort used for the corpus-placement ranking above). 50% of that cohort has fewer violations than Yorktown Naval Weapons Station. 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.

Contaminant	Category	Count	Latest
Coliform (TCR)	MCL	20	2004
Lead and Copper Rule	MR	4	1993
Coliform (TCR)	MR	1	1991
Endrin	MR	1	1980
2,4-D	MR	1	1980
Toxaphene	MR	1	1980
Chromium	MR	1	1980
Methoxychlor	MR	1	1980
BHC-GAMMA	MR	1	1980
Selenium	MR	1	1980
Fluoride	MR	1	1980
Mercury	MR	1	1980
Barium	MR	1	1980
Arsenic	MR	1	1980
2,4,5-TP	MR	1	1980
Cadmium	MR	1	1980

Yorktown Naval Weapons Station

Yorktown Naval Weapons Station standing, mid SDWIS violation third

System Details

Violation History

Violation Count vs. the National Corpus

Health-based violations on Yorktown Naval Weapons Station

Nationwide peers

Cross-state systems near this violation count

Cross-state systems near this population served