Question 1

Is Stonehenge S/D water safe to drink?

Accepted Answer

Stonehenge S/D (PWS ID: NC0392298) has 294 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. EPA SDWIS lists this system's service population as 1,840 people using Groundwater sources.

Question 2

How many people does Stonehenge S/D serve?

Accepted Answer

EPA SDWIS reports that Stonehenge S/D serves 1,840 people (this public water system's service population, not the municipal population of Cary or any other city). It is a Private-owned system using Groundwater water sources with 737 service connections. The operator address is listed in Cary, North Carolina.

Question 3

What type of violations does Stonehenge S/D have?

Accepted Answer

Stonehenge S/D has 294 total violations: 231 health-based violations (MCL exceedances or treatment failures), 28 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 Stonehenge S/D water?

Accepted Answer

No PFAS testing data is available for Stonehenge S/D under the EPA's UCMR5 monitoring program.

Question 5

What water source does Stonehenge S/D use?

Accepted Answer

Stonehenge S/D 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 Stonehenge S/D sit among U.S. public water systems?

Accepted Answer

According to EPA SDWIS population_served among sitemap-advertised systems (serving 500+), Stonehenge S/D ranks #14,263 of 29,740 by people served, and #381 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 Stonehenge S/D's violation count compare nationally?

Accepted Answer

Stonehenge S/D has 294 recorded EPA SDWIS violations, fewer than 9% of the 29,740 public water systems serving 500 or more people nationwide (the same sitemap cohort used for the corpus-placement ranking above). 91% of that cohort has fewer violations than Stonehenge S/D. 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
Combined Radium (-226 and -228)	MCL	198	2008
Gross Alpha, Excl. Radon and U	MCL	33	2007
Public Notice	Other	20	2008
Nitrate	MR	7	2023
Consumer Confidence Rule	Other	6	2024
Gross Alpha, Excl. Radon and U	MR	4	2008
Combined Radium (-226 and -228)	MR	3	2008
Selenium	MR	2	1985
Chromium	MR	2	1985
Fluoride	MR	2	1985
Mercury	MR	2	1985
Arsenic	MR	2	1985
Cadmium	MR	2	1985
Barium	MR	2	1985

Stonehenge S/D

Stonehenge S/D standing, high SDWIS violation third

System Details

Violation History

Violation Count vs. the National Corpus

Health-based violations on Stonehenge S/D

Nationwide peers

Cross-state systems with comparable violation load

Cross-state systems near this population served