Question 1

Is Knollwood Elem School water safe to drink?

Accepted Answer

Knollwood Elem School (PWS ID: NC0180654) has 147 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. EPA SDWIS lists this system's service population as 750 people using Groundwater sources.

Question 2

How many people does Knollwood Elem School serve?

Accepted Answer

EPA SDWIS reports that Knollwood Elem School serves 750 people (this public water system's service population, not the municipal population of Salisbury or any other city). It is a Local-owned system using Groundwater water sources with 1 service connections. The operator address is listed in Salisbury, North Carolina.

Question 3

What type of violations does Knollwood Elem School have?

Accepted Answer

Knollwood Elem School has 147 total violations: 7 health-based violations (MCL exceedances or treatment failures), 133 monitoring/reporting violations, and 2 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.

Question 4

Has PFAS been detected in Knollwood Elem School water?

Accepted Answer

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

Question 5

What water source does Knollwood Elem School use?

Accepted Answer

Knollwood Elem 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 Knollwood Elem School sit among U.S. public water systems?

Accepted Answer

According to EPA SDWIS population_served among sitemap-advertised systems (serving 500+), Knollwood Elem School ranks #23,440 of 29,740 by people served, and #558 of 713 in North Carolina. Ordinals use population_served DESC among systems serving 500+ (the sitemap cohort). See /methodology#corpus-placement.

Question 8

How does Knollwood Elem School's violation count compare nationally?

Accepted Answer

Knollwood Elem School has 147 recorded EPA SDWIS violations, fewer than 19% of the 29,740 public water systems serving 500 or more people nationwide (the same sitemap cohort used for the corpus-placement ranking above). 81% of that cohort has fewer violations than Knollwood Elem 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
TTHM	MR	10	2021
Total Haloacetic Acids (HAA5)	MR	10	2021
CYANIDE	MR	7	2001
DICHLOROMETHANE	MR	5	2008
o-Dichlorobenzene	MR	5	2008
p-Dichlorobenzene	MR	5	2008
Vinyl chloride	MR	5	2008
1,1-Dichloroethylene	MR	5	2008
1,1,1-Trichloroethane	MR	5	2008
1,2-Dichloropropane	MR	5	2008
Trichloroethylene	MR	5	2008
1,1,2-Trichloroethane	MR	5	2008
CHLOROBENZENE	MR	5	2008
Benzene	MR	5	2008
Toluene	MR	5	2008
Styrene	MR	5	2008
Xylenes, Total	MR	5	2008
Coliform (TCR)	MCL	5	2005
1,2-Dichloroethane	MR	5	2008
Ethylbenzene	MR	5	2008
trans-1,2-Dichloroethylene	MR	5	2008
Tetrachloroethylene	MR	5	2008
cis-1,2-Dichloroethylene	MR	5	2008
1,2,4-Trichlorobenzene	MR	5	2008
Carbon tetrachloride	MR	5	2008
Public Notice	Other	4	2005
LEAD AND COPPER RULE REVISIONS	RPT	2	2024
LEAD AND COPPER RULE REVISIONS	TT	2	2024
Revised Total Coliform Rule	MON	1	2025

Knollwood Elem School

Knollwood Elem School standing, high SDWIS violation third

System Details

Violation History

Violation Count vs. the National Corpus

Population served record for Knollwood Elem School

Nationwide peers

Cross-state systems with comparable violation load

Cross-state systems with smaller service footprints