AZ STATE PKS PATAGONIA LAKE

Arizona — Transient Non-Community — PWSID: AZ0412302

System Information

PWSID	AZ0412302
System Name	AZ STATE PKS PATAGONIA LAKE
System Type	Transient Non-Community
Water Source	Ground Water
Activity Status	Active
Owner Type	State
EPA Region	09
Serves School	No
Wholesaler	No
First Reported	Oct 5, 1979
Last Reported	Nov 17, 2025

Location & Contact

State	Arizona
City	NOGALES
ZIP Code	85621
Address	400 Patagonia Lake
Organization	ALFORD, COLT
Phone	520-287-6965

Population & Service

Population Served	564
Service Connections	140

Drinking Water Violations (24)

This water system has 24 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
Jun 1, 2020	—	Revised Total Coliform Rule	RPT	No	No	—	—	—	Resolved	Jul 21, 2020	Revised Total Coliform Rule
Jun 1, 2020	—	Revised Total Coliform Rule	RPT	No	No	—	—	—	Resolved	Jul 21, 2020	Revised Total Coliform Rule
Jan 1, 2013	Dec 31, 2013	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 2013	Nitrate Rule
Jan 1, 2013	Dec 31, 2013	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 2013	Nitrate Rule
Oct 1, 2010	Oct 31, 2010	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Oct 31, 2010	Total Coliform Rule
Oct 1, 2010	Oct 31, 2010	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Oct 31, 2010	Total Coliform Rule
Jan 1, 2009	Dec 31, 2009	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 2009	Nitrate Rule
Jan 1, 2009	Dec 31, 2009	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 2009	Nitrate Rule
May 1, 2007	May 31, 2007	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	May 31, 2007	Total Coliform Rule
Mar 1, 2007	Mar 31, 2007	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Mar 31, 2007	Total Coliform Rule
Aug 1, 2006	Aug 31, 2006	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Aug 31, 2006	Total Coliform Rule
Aug 1, 2006	Aug 31, 2006	Coliform (TCR)	MCL	Yes	No	—	5% of samples	—	Resolved	Aug 31, 2006	Total Coliform Rule
Mar 1, 2006	Mar 31, 2006	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Mar 31, 2006	Total Coliform Rule
Jan 1, 2006	Dec 31, 2006	Nitrate	MR	No	Yes	—	10 mg/L	—	Resolved	Dec 31, 2006	Nitrate Rule
Oct 1, 2004	Oct 31, 2004	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Oct 31, 2004	Total Coliform Rule
Oct 1, 2004	Oct 31, 2004	Coliform (TCR)	MR	No	No	—	5% of samples	—	Resolved	Oct 31, 2004	Total Coliform Rule
Jan 1, 1988	Mar 31, 1988	Selenium	MR	No	Yes	—	0.05 mg/L	—	Archived	Mar 31, 1988	Inorganic Chemicals
Jan 1, 1988	Mar 31, 1988	Cadmium	MR	No	Yes	—	0.005 mg/L	—	Archived	Mar 31, 1988	Inorganic Chemicals
Jan 1, 1988	Mar 31, 1988	Fluoride	MR	No	Yes	—	4.0 mg/L	—	Archived	Mar 31, 1988	Inorganic Chemicals
Jan 1, 1988	Mar 31, 1988	Nitrate	MR	No	Yes	—	10 mg/L	—	Archived	Mar 31, 1988	Nitrate Rule
Jan 1, 1988	Mar 31, 1988	Chromium	MR	No	Yes	—	0.1 mg/L	—	Archived	Mar 31, 1988	Inorganic Chemicals
Jan 1, 1988	Mar 31, 1988	Mercury	MR	No	Yes	—	0.002 mg/L	—	Archived	Mar 31, 1988	Inorganic Chemicals
Jan 1, 1988	Mar 31, 1988	Barium	MR	No	Yes	—	2 mg/L	—	Archived	Mar 31, 1988	Inorganic Chemicals
Mar 19, 1985	Mar 17, 1988	Arsenic	MR	No	Yes	—	0.010 mg/L	—	Archived	Mar 17, 1988	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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