Question 1

Is Twin Valley Middle School water safe to drink?

Accepted Answer

Twin Valley Middle School (PWS ID: PA3061021) has 164 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. EPA SDWIS lists this system's service population as 1,140 people using Groundwater sources.

Question 2

How many people does Twin Valley Middle School serve?

Accepted Answer

EPA SDWIS reports that Twin Valley Middle School serves 1,140 people (this public water system's service population, not the municipal population of Elverson or any other city). It is a Public/Private-owned system using Groundwater water sources with 1 service connections. The operator address is listed in Elverson, Pennsylvania.

Question 3

What type of violations does Twin Valley Middle School have?

Accepted Answer

Twin Valley Middle School has 164 total violations: 4 health-based violations (MCL exceedances or treatment failures), 158 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 Twin Valley Middle School water?

Accepted Answer

No PFAS testing data is available for Twin Valley Middle School under the EPA's UCMR5 monitoring program.

Question 5

What water source does Twin Valley Middle School use?

Accepted Answer

Twin Valley Middle School uses Groundwater as its primary water source. It is classified as a Non-Transient Non-Community Water System, serving the same people for at least 6 months per year.

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 Twin Valley Middle School sit among U.S. public water systems?

Accepted Answer

According to EPA SDWIS population_served among sitemap-advertised systems (serving 500+), Twin Valley Middle School ranks #18,319 of 29,740 by people served, and #712 of 1,340 in Pennsylvania. Ordinals use population_served DESC among systems serving 500+ (the sitemap cohort). See /methodology#corpus-placement.

Question 8

How does Twin Valley Middle School's violation count compare nationally?

Accepted Answer

Twin Valley Middle School has 164 recorded EPA SDWIS violations, fewer than 18% of the 29,740 public water systems serving 500 or more people nationwide (the same sitemap cohort used for the corpus-placement ranking above). 82% of that cohort has fewer violations than Twin Valley Middle School. 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
Chlorine	MR	38	2018
Coliform (TCR)	MR	14	2013
cis-1,2-Dichloroethylene	MR	5	1993
1,2-Dichloroethane	MR	5	1993
1,1,1-Trichloroethane	MR	5	1993
Tetrachloroethylene	MR	5	1993
CHLOROBENZENE	MR	5	1993
Benzene	MR	5	1993
Ethylbenzene	MR	5	1993
Styrene	MR	5	1993
p-Dichlorobenzene	MR	5	1993
Carbon tetrachloride	MR	5	1993
Toluene	MR	5	1993
1,2,4-Trichlorobenzene	MR	5	1993
trans-1,2-Dichloroethylene	MR	5	1993
o-Dichlorobenzene	MR	5	1993
Trichloroethylene	MR	5	1993
1,1,2-Trichloroethane	MR	5	1993
1,1-Dichloroethylene	MR	5	1993
1,2-Dichloropropane	MR	5	1993
Xylenes, Total	MR	5	1993
DICHLOROMETHANE	MR	5	1993
Coliform (TCR)	MCL	4	2012
Nitrate	MR	3	2004
TTHM	MR	3	2019
Revised Total Coliform Rule	RPT	2	2017

Twin Valley Middle School

Twin Valley Middle School standing, high SDWIS violation third

System Details

Violation History

Violation Count vs. the National Corpus

SDWIS compliance record for Twin Valley Middle School

Nationwide peers

Cross-state systems with comparable violation load

Cross-state systems near this population served