Question 1

Is Mason Water Dept water safe to drink?

Accepted Answer

Mason Water Dept (PWS ID: WV3302708) has 493 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. EPA SDWIS lists this system's service population as 1,679 people using Groundwater sources.

Question 2

How many people does Mason Water Dept serve?

Accepted Answer

EPA SDWIS reports that Mason Water Dept serves 1,679 people (this public water system's service population, not the municipal population of Mason or any other city). It is a Local-owned system using Groundwater water sources with 769 service connections. The operator address is listed in Mason, West Virginia.

Question 3

What type of violations does Mason Water Dept have?

Accepted Answer

Mason Water Dept has 493 total violations: 4 health-based violations (MCL exceedances or treatment failures), 426 monitoring/reporting violations, and 4 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.

Question 4

Has PFAS been detected in Mason Water Dept water?

Accepted Answer

No PFAS testing data is available for Mason Water Dept under the EPA's UCMR5 monitoring program.

Question 5

What water source does Mason Water Dept use?

Accepted Answer

Mason Water Dept uses Groundwater 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 Mason Water Dept sit among U.S. public water systems?

Accepted Answer

According to EPA SDWIS population_served among sitemap-advertised systems (serving 500+), Mason Water Dept ranks #15,009 of 29,740 by people served, and #190 of 312 in West Virginia. Ordinals use population_served DESC among systems serving 500+ (the sitemap cohort). See /methodology#corpus-placement.

Question 8

How does Mason Water Dept's violation count compare nationally?

Accepted Answer

Mason Water Dept has 493 recorded EPA SDWIS violations, fewer than 5% of the 29,740 public water systems serving 500 or more people nationwide (the same sitemap cohort used for the corpus-placement ranking above). 95% of that cohort has fewer violations than Mason Water Dept. 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
Nitrate	MR	42	2025
Public Notice	Other	34	2025
Consumer Confidence Rule	Other	17	2025
Lead and Copper Rule	MR	15	2023
TTHM	MR	14	2020
Total Haloacetic Acids (HAA5)	MR	14	2020
Chlorine	MR	13	2025
Di(2-ethylhexyl) adipate	MR	11	2013
OXAMYL	MR	11	2013
Picloram	MR	11	2013
Atrazine	MR	11	2013
Total Polychlorinated Biphenyls (PCB)	MR	11	2013
Simazine	MR	11	2013
Di(2-ethylhexyl) phthalate	MR	11	2013
Hexachlorocyclopentadiene	MR	11	2013
Carbofuran	MR	11	2013
LASSO	MR	11	2013
Heptachlor	MR	11	2013
2,4-D	MR	11	2013
Heptachlor epoxide	MR	11	2013
Benzo(a)pyrene	MR	11	2013
BHC-GAMMA	MR	11	2013
Chlordane	MR	11	2013
Methoxychlor	MR	8	2013
Endrin	MR	4	2002
Toxaphene	MR	4	2002
Dinoseb	MR	4	2002
2,4,5-TP	MR	4	2002
HEXACHLOROBENZENE	MR	4	2002
ETHYLENE DIBROMIDE	MR	4	2002

Mason Water Dept

Mason Water Dept standing, high SDWIS violation third

System Details

Violation History

Violation Count vs. the National Corpus

SDWIS compliance record for Mason Water Dept

Nationwide peers

Cross-state systems with comparable violation load

Cross-state systems near this population served