CONSTELLATION NUCLEAR PWR PLNT

Pennsylvania — Non-Transient Non-Community — PWSID: PA1460847

System Information

PWSID	PA1460847
System Name	CONSTELLATION NUCLEAR PWR PLNT
System Type	Non-Transient Non-Community
Water Source	Ground Water
Activity Status	Active
Owner Type	Local
EPA Region	03
Serves School	No
Wholesaler	No
First Reported	Jan 21, 1981
Last Reported	Dec 17, 2025

Location & Contact

State	Pennsylvania
City	POTTSTOWN
ZIP Code	19464
Address	3146 SANATOGA RD, SSB 2-1
Organization	CONSTELLATION NUCLEAR PWR PLNT
Phone	610-718-2513

Population & Service

Population Served	1,650
Service Connections	9

Drinking Water Violations (122)

This water system has 122 violations recorded in the EPA SDWIS database.

Begin Date	End Date	Contaminant	Category	Health-Based	Major	Measured	Federal MCL	State MCL	Status	Return to Compliance	Rule
Jan 1, 2025	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Jan 28, 2025	Lead and Copper Rule
Jan 1, 2025	—	Lead and Copper Rule	MR	No	No	—	TT	—	Resolved	Jan 28, 2025	Lead and Copper Rule
Jan 1, 2011	Mar 31, 2011	Chlorine	MR	No	Yes	—	4.0 mg/L	—	Resolved	Mar 25, 2011	Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2011	Mar 31, 2011	Chlorine	MR	No	Yes	—	4.0 mg/L	—	Resolved	Mar 25, 2011	Stage 1 Disinfectants and Disinfection Byproducts Rule
May 11, 2006	—	Public Notice	Other	No	No	—	—	—	Resolved	Jun 28, 2006	Public Notice Rule and Revised PN Rule
May 11, 2006	—	Public Notice	Other	No	No	—	—	—	Resolved	Jun 28, 2006	Public Notice Rule and Revised PN Rule
May 11, 2006	—	Public Notice	Other	No	No	—	—	—	Resolved	Jun 28, 2006	Public Notice Rule and Revised PN Rule
May 11, 2006	—	Public Notice	Other	No	No	—	—	—	Resolved	Jun 28, 2006	Public Notice Rule and Revised PN Rule
Jan 1, 2006	Mar 31, 2006	Arsenic	MR	No	Yes	—	0.010 mg/L	—	Resolved	Mar 31, 2006	Arsenic Rule
Jan 1, 2006	Mar 31, 2006	Arsenic	MR	No	Yes	—	0.010 mg/L	—	Resolved	Mar 31, 2006	Arsenic Rule
Jan 1, 2006	Mar 31, 2006	Arsenic	MR	No	Yes	—	0.010 mg/L	—	Resolved	Mar 31, 2006	Arsenic Rule
Jan 1, 2006	Mar 31, 2006	Arsenic	MR	No	Yes	—	0.010 mg/L	—	Resolved	Mar 31, 2006	Arsenic Rule
Apr 1, 2005	Mar 31, 2006	Arsenic	MCL	Yes	No	.011	0.010 mg/L	—	Resolved	Mar 31, 2006	Arsenic Rule
Apr 1, 2005	Mar 31, 2006	Arsenic	MCL	Yes	No	.011	0.010 mg/L	—	Resolved	Mar 31, 2006	Arsenic Rule
Apr 1, 2005	Mar 31, 2006	Arsenic	MCL	Yes	No	.011	0.010 mg/L	—	Resolved	Mar 31, 2006	Arsenic Rule
Apr 1, 2005	Mar 31, 2006	Arsenic	MCL	Yes	No	.011	0.010 mg/L	—	Resolved	Mar 31, 2006	Arsenic Rule
Jul 1, 1999	Sep 30, 1999	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Sep 30, 1999	Nitrate Rule
Jul 1, 1999	Sep 30, 1999	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Sep 30, 1999	Nitrate Rule
Jul 1, 1999	Sep 30, 1999	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Sep 30, 1999	Nitrate Rule
Jun 1, 1998	Jun 30, 1998	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Jun 30, 1998	Total Coliform Rule
May 1, 1998	May 31, 1998	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	May 31, 1998	Total Coliform Rule
Jan 1, 1997	Dec 31, 1997	Fluoride	MR	No	Yes	—	4.0 mg/L	—	Resolved	Dec 31, 1997	Inorganic Chemicals
Jan 1, 1997	Dec 31, 1997	Antimony, Total	MR	No	Yes	—	0.006 mg/L	—	Resolved	Dec 31, 1997	Inorganic Chemicals
Jan 1, 1997	Dec 31, 1997	Fluoride	MR	No	Yes	—	4.0 mg/L	—	Resolved	Dec 31, 1997	Inorganic Chemicals
Jan 1, 1997	Dec 31, 1997	Nickel	MR	No	Yes	—	—	—	Resolved	Dec 31, 1997	Inorganic Chemicals
Jan 1, 1997	Dec 31, 1997	Nickel	MR	No	Yes	—	—	—	Resolved	Dec 31, 1997	Inorganic Chemicals
Jan 1, 1997	Dec 31, 1997	Nickel	MR	No	Yes	—	—	—	Resolved	Dec 31, 1997	Inorganic Chemicals
Jan 1, 1997	Dec 31, 1997	Selenium	MR	No	Yes	—	0.05 mg/L	—	Resolved	Dec 31, 1997	Inorganic Chemicals
Jan 1, 1997	Dec 31, 1997	Selenium	MR	No	Yes	—	0.05 mg/L	—	Resolved	Dec 31, 1997	Inorganic Chemicals
Jan 1, 1997	Dec 31, 1997	Selenium	MR	No	Yes	—	0.05 mg/L	—	Resolved	Dec 31, 1997	Inorganic Chemicals
Jan 1, 1997	Dec 31, 1997	Antimony, Total	MR	No	Yes	—	0.006 mg/L	—	Resolved	Dec 31, 1997	Inorganic Chemicals
Jan 1, 1997	Dec 31, 1997	Antimony, Total	MR	No	Yes	—	0.006 mg/L	—	Resolved	Dec 31, 1997	Inorganic Chemicals
Jan 1, 1997	Dec 31, 1997	Beryllium, Total	MR	No	Yes	—	0.004 mg/L	—	Resolved	Dec 31, 1997	Inorganic Chemicals
Jan 1, 1997	Dec 31, 1997	Beryllium, Total	MR	No	Yes	—	0.004 mg/L	—	Resolved	Dec 31, 1997	Inorganic Chemicals
Jan 1, 1997	Dec 31, 1997	Arsenic	MR	No	Yes	—	0.010 mg/L	—	Resolved	Dec 31, 1997	Arsenic Rule
Jan 1, 1997	Dec 31, 1997	Thallium, Total	MR	No	Yes	—	0.002 mg/L	—	Resolved	Dec 31, 1997	Inorganic Chemicals
Jan 1, 1997	Dec 31, 1997	Thallium, Total	MR	No	Yes	—	0.002 mg/L	—	Resolved	Dec 31, 1997	Inorganic Chemicals
Jan 1, 1997	Dec 31, 1997	Thallium, Total	MR	No	Yes	—	0.002 mg/L	—	Resolved	Dec 31, 1997	Inorganic Chemicals
Jan 1, 1997	Dec 31, 1997	Cadmium	MR	No	Yes	—	0.005 mg/L	—	Resolved	Dec 31, 1997	Inorganic Chemicals
Jan 1, 1997	Dec 31, 1997	Cadmium	MR	No	Yes	—	0.005 mg/L	—	Resolved	Dec 31, 1997	Inorganic Chemicals
Jan 1, 1997	Dec 31, 1997	Cadmium	MR	No	Yes	—	0.005 mg/L	—	Resolved	Dec 31, 1997	Inorganic Chemicals
Jan 1, 1997	Dec 31, 1997	Chromium	MR	No	Yes	—	0.1 mg/L	—	Resolved	Dec 31, 1997	Inorganic Chemicals
Jan 1, 1997	Dec 31, 1997	Chromium	MR	No	Yes	—	0.1 mg/L	—	Resolved	Dec 31, 1997	Inorganic Chemicals
Jan 1, 1997	Dec 31, 1997	Chromium	MR	No	Yes	—	0.1 mg/L	—	Resolved	Dec 31, 1997	Inorganic Chemicals
Jan 1, 1997	Dec 31, 1997	Mercury	MR	No	Yes	—	0.002 mg/L	—	Resolved	Dec 31, 1997	Inorganic Chemicals
Jan 1, 1997	Dec 31, 1997	Barium	MR	No	Yes	—	2 mg/L	—	Resolved	Dec 31, 1997	Inorganic Chemicals
Jan 1, 1997	Dec 31, 1997	Barium	MR	No	Yes	—	2 mg/L	—	Resolved	Dec 31, 1997	Inorganic Chemicals
Jan 1, 1997	Dec 31, 1997	Barium	MR	No	Yes	—	2 mg/L	—	Resolved	Dec 31, 1997	Inorganic Chemicals
Jan 1, 1997	Dec 31, 1997	Mercury	MR	No	Yes	—	0.002 mg/L	—	Resolved	Dec 31, 1997	Inorganic Chemicals
Jan 1, 1997	Dec 31, 1997	Arsenic	MR	No	Yes	—	0.010 mg/L	—	Resolved	Dec 31, 1997	Arsenic Rule

About This Water System

Public water system data comes from the EPA Safe Drinking Water Information System (SDWIS). Systems with violations must notify customers. Contact your water utility for the latest annual water quality report.

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