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Kitt Peak National Observatory

Arizona — Non-Transient Non-Community — PWSID: 090402057

System Information

PWSID090402057
System NameKitt Peak National Observatory
System TypeNon-Transient Non-Community
Water SourceSurface Water
Activity StatusActive
Owner TypeFederal
EPA Region09
Serves SchoolNo
WholesalerNo
First ReportedJun 28, 2003
Last ReportedDec 31, 2025

Location & Contact

StateArizona
CityTucson
ZIP Code85719
Address950 North Cherry Avenue
OrganizationNOIRLab, KPNO
Phone5203188284

Population & Service

Population Served247
Service Connections41

Drinking Water Violations (97)

This water system has 97 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
Nov 16, 2024 — LEAD AND COPPER RULE REVISIONS RPT No No — — — Resolved Feb 21, 2025 Lead and Copper Rule Revisions
Nov 16, 2024 — LEAD AND COPPER RULE REVISIONS RPT No No — — — Resolved Feb 21, 2025 Lead and Copper Rule Revisions
Nov 16, 2024 — LEAD AND COPPER RULE REVISIONS RPT No No — — — Resolved Feb 21, 2025 Lead and Copper Rule Revisions
Jan 1, 2024 — Revised Total Coliform Rule RPT No No — — — Resolved Feb 1, 2024 Revised Total Coliform Rule
Oct 1, 2021 — Revised Total Coliform Rule RPT No No — — — Resolved Dec 10, 2021 Revised Total Coliform Rule
Mar 1, 2017 Mar 31, 2017 Chlorite MCL Yes No 1.1 MG/L 1.0 mg/L — Resolved Mar 31, 2017 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2012 Sep 30, 2012 TTHM MCL Yes No .1025 MG/L 0.080 mg/L — Resolved Sep 30, 2012 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2012 Sep 30, 2012 TTHM MCL Yes No .1025 MG/L 0.080 mg/L — Resolved Sep 30, 2012 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2012 Jun 30, 2012 TTHM MCL Yes No .11363 MG/L 0.080 mg/L — Resolved Jun 30, 2012 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2012 Jun 30, 2012 TTHM MCL Yes No .11363 MG/L 0.080 mg/L — Resolved Jun 30, 2012 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2012 Mar 31, 2012 TTHM MCL Yes No .1342 MG/L 0.080 mg/L — Resolved Mar 31, 2012 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2012 Mar 31, 2012 TTHM MCL Yes No .1342 MG/L 0.080 mg/L — Resolved Mar 31, 2012 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2012 Mar 31, 2012 TTHM MCL Yes No .1342 MG/L 0.080 mg/L — Resolved Mar 31, 2012 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2011 Dec 31, 2011 TTHM MCL Yes No .1435 MG/L 0.080 mg/L — Resolved Dec 31, 2011 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2011 Dec 31, 2011 TTHM MCL Yes No .1435 MG/L 0.080 mg/L — Resolved Dec 31, 2011 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2011 Dec 31, 2011 TTHM MCL Yes No .1435 MG/L 0.080 mg/L — Resolved Dec 31, 2011 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2011 Sep 30, 2011 TTHM MCL Yes No .13475 MG/L 0.080 mg/L — Resolved Sep 30, 2011 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2011 Sep 30, 2011 TTHM MCL Yes No .13475 MG/L 0.080 mg/L — Resolved Sep 30, 2011 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2011 Sep 30, 2011 TTHM MCL Yes No .13475 MG/L 0.080 mg/L — Resolved Sep 30, 2011 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2011 Jun 30, 2011 TTHM MCL Yes No .08801 MG/L 0.080 mg/L — Resolved Jun 30, 2011 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2011 Jun 30, 2011 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Jun 30, 2011 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2011 Jun 30, 2011 TTHM MCL Yes No .08801 MG/L 0.080 mg/L — Resolved Jun 30, 2011 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2011 Jun 30, 2011 TTHM MCL Yes No .08801 MG/L 0.080 mg/L — Resolved Jun 30, 2011 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2011 Jun 30, 2011 TTHM MR No Yes — 0.080 mg/L — Resolved Jun 30, 2011 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2011 Jun 30, 2011 TTHM MR No Yes — 0.080 mg/L — Resolved Jun 30, 2011 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2011 Jun 30, 2011 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Jun 30, 2011 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2011 Mar 31, 2011 TTHM MCL Yes No .08801 MG/L 0.080 mg/L — Resolved Mar 31, 2011 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2011 Mar 31, 2011 TTHM MCL Yes No .08801 MG/L 0.080 mg/L — Resolved Mar 31, 2011 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2011 Mar 31, 2011 TTHM MCL Yes No .08801 MG/L 0.080 mg/L — Resolved Mar 31, 2011 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2010 Jun 30, 2010 TTHM MCL Yes No .10223 MG/L 0.080 mg/L — Resolved Jun 30, 2010 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2010 Jun 30, 2010 TTHM MCL Yes No .10223 MG/L 0.080 mg/L — Resolved Jun 30, 2010 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2010 Jun 30, 2010 TTHM MCL Yes No .10223 MG/L 0.080 mg/L — Resolved Jun 30, 2010 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2010 Dec 31, 2010 Nitrate MR No Yes — 10 mg/L — Resolved Dec 31, 2010 Nitrate Rule
Oct 1, 2009 Dec 31, 2009 Total Haloacetic Acids (HAA5) MCL Yes No .07738 MG/L 0.060 mg/L — Resolved Dec 31, 2009 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2009 Dec 31, 2009 TTHM MCL Yes No .08958 MG/L 0.080 mg/L — Resolved Dec 31, 2009 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2009 Dec 31, 2009 TTHM MCL Yes No .08958 MG/L 0.080 mg/L — Resolved Dec 31, 2009 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2009 Dec 31, 2009 Total Haloacetic Acids (HAA5) MCL Yes No .07738 MG/L 0.060 mg/L — Resolved Dec 31, 2009 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2009 Dec 31, 2009 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Dec 31, 2009 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2009 Dec 31, 2009 TTHM MCL Yes No .08958 MG/L 0.080 mg/L — Resolved Dec 31, 2009 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2009 Dec 31, 2009 Total Haloacetic Acids (HAA5) MCL Yes No .07738 MG/L 0.060 mg/L — Resolved Dec 31, 2009 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2009 Dec 31, 2009 TTHM MR No Yes — 0.080 mg/L — Resolved Dec 31, 2009 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2009 Sep 30, 2009 TTHM MCL Yes No .08958 MG/L 0.080 mg/L — Resolved Sep 30, 2009 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2009 Sep 30, 2009 Total Haloacetic Acids (HAA5) MCL Yes No .07738 MG/L 0.060 mg/L — Resolved Sep 30, 2009 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2009 Sep 30, 2009 TTHM MCL Yes No .08958 MG/L 0.080 mg/L — Resolved Sep 30, 2009 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2009 Sep 30, 2009 TTHM MCL Yes No .08958 MG/L 0.080 mg/L — Resolved Sep 30, 2009 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2009 Sep 30, 2009 Total Haloacetic Acids (HAA5) MCL Yes No .07738 MG/L 0.060 mg/L — Resolved Sep 30, 2009 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2009 Sep 30, 2009 Total Haloacetic Acids (HAA5) MCL Yes No .07738 MG/L 0.060 mg/L — Resolved Sep 30, 2009 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jun 1, 2009 Jun 30, 2009 Coliform (TCR) MR No No — 5% of samples — Resolved Jun 30, 2009 Total Coliform Rule
Jan 1, 2009 Mar 31, 2009 Total Haloacetic Acids (HAA5) MCL Yes No .09243 MG/L 0.060 mg/L — Resolved Mar 31, 2009 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2009 Mar 31, 2009 Total Haloacetic Acids (HAA5) MR No Yes — 0.060 mg/L — Resolved Mar 31, 2009 Stage 1 Disinfectants and Disinfection Byproducts 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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