Question 1

Is Thomas water safe to drink?

Accepted Answer

Thomas (PWS ID: OK2002001) has 68 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. EPA SDWIS lists this system's service population as 1,238 people using Groundwater sources.

Question 2

How many people does Thomas serve?

Accepted Answer

EPA SDWIS reports that Thomas serves 1,238 people (this public water system's service population, not the municipal population of Thomas or any other city). It is a Private-owned system using Groundwater water sources with 646 service connections. The operator address is listed in Thomas, Oklahoma.

Question 3

What type of violations does Thomas have?

Accepted Answer

Thomas has 68 total violations: 0 health-based violations (MCL exceedances or treatment failures), 59 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 Thomas water?

Accepted Answer

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

Question 5

What water source does Thomas use?

Accepted Answer

Thomas 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 Thomas sit among U.S. public water systems?

Accepted Answer

According to EPA SDWIS population_served among sitemap-advertised systems (serving 500+), Thomas ranks #17,552 of 29,740 by people served, and #344 of 558 in Oklahoma. Ordinals use population_served DESC among systems serving 500+ (the sitemap cohort). See /methodology#corpus-placement.

Question 8

How does Thomas's violation count compare nationally?

Accepted Answer

Thomas has 68 recorded EPA SDWIS violations, fewer than 35% of the 29,740 public water systems serving 500 or more people nationwide (the same sitemap cohort used for the corpus-placement ranking above). 64% of that cohort has fewer violations than Thomas. 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)	MR	13	2011
Revised Total Coliform Rule	MON	4	2018
1,2,4-Trichlorobenzene	MR	2	1995
cis-1,2-Dichloroethylene	MR	2	1995
Xylenes, Total	MR	2	1995
Vinyl chloride	MR	2	1995
trans-1,2-Dichloroethylene	MR	2	1995
Carbon tetrachloride	MR	2	1995
Benzene	MR	2	1995
Toluene	MR	2	1995
Styrene	MR	2	1995
p-Dichlorobenzene	MR	2	1995
1,2-Dichloropropane	MR	2	1995
1,1,1-Trichloroethane	MR	2	1995
Tetrachloroethylene	MR	2	1995
o-Dichlorobenzene	MR	2	1995
DICHLOROMETHANE	MR	2	1995
Lead and Copper Rule	MR	2	1993
1,1,2-Trichloroethane	MR	2	1995
1,1-Dichloroethylene	MR	2	1995
Trichloroethylene	MR	2	1995
CHLOROBENZENE	MR	2	1995
Ethylbenzene	MR	2	1995

Thomas

Thomas standing, mid SDWIS violation third

System Details

Violation History

Violation Count vs. the National Corpus

Health-based violations on Thomas

Nationwide peers

Cross-state systems near this violation count

Cross-state systems near this population served