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GRAND CANYON NATIONAL PARK

Arizona — Community Water System — PWSID: AZ0403702

System Information

PWSIDAZ0403702
System NameGRAND CANYON NATIONAL PARK
System TypeCommunity Water System
Water SourceGround Water
Activity StatusActive
Owner TypeFederal
EPA Region09
Serves SchoolNo
WholesalerNo
First ReportedOct 5, 1979
Last ReportedNov 17, 2025

Location & Contact

StateArizona
CityGRAND CANYON
ZIP Code86023
AddressPO BOX 129
OrganizationSTONE, TREACY
Phone—

Population & Service

Population Served16,590
Service Connections630

Drinking Water Violations (392)

This water system has 392 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
Sep 2, 2025 — Public Notice Other No No — — — Unaddressed — Public Notice Rule and Revised PN Rule
Jul 1, 2025 — Consumer Confidence Rule Other No No — — — Resolved Jul 3, 2025 Consumer Confidence Rule
Apr 1, 2025 Jun 30, 2025 Styrene MR No Yes — 0.1 mg/L — Archived Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Jun 30, 2025 1,2,4-Trichlorobenzene MR No Yes — 0.07 mg/L — Archived Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Jun 30, 2025 Styrene MR No Yes — 0.1 mg/L — Archived Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Jun 30, 2025 1,1-Dichloroethylene MR No Yes — 0.007 mg/L — Archived Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Jun 30, 2025 Tetrachloroethylene MR No Yes — 0.005 mg/L — Archived Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Jun 30, 2025 1,2-Dichloroethane MR No Yes — 0.005 mg/L — Archived Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Jun 30, 2025 Trichloroethylene MR No Yes — 0.005 mg/L — Archived Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Jun 30, 2025 Benzene MR No Yes — 0.005 mg/L — Archived Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Jun 30, 2025 Benzene MR No Yes — 0.005 mg/L — Archived Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Jun 30, 2025 Carbon tetrachloride MR No Yes — 0.005 mg/L — Archived Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Jun 30, 2025 1,1,2-Trichloroethane MR No Yes — 0.005 mg/L — Archived Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Jun 30, 2025 Ethylbenzene MR No Yes — 0.7 mg/L — Archived Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Jun 30, 2025 o-Dichlorobenzene MR No Yes — 0.6 mg/L — Archived Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Jun 30, 2025 1,1,1-Trichloroethane MR No Yes — 0.2 mg/L — Archived Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Jun 30, 2025 1,1-Dichloroethylene MR No Yes — 0.007 mg/L — Archived Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Jun 30, 2025 Toluene MR No Yes — 1 mg/L — Archived Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Jun 30, 2025 p-Dichlorobenzene MR No Yes — 0.075 mg/L — Archived Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Jun 30, 2025 Trichloroethylene MR No Yes — 0.005 mg/L — Archived Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Jun 30, 2025 1,2,4-Trichlorobenzene MR No Yes — 0.07 mg/L — Archived Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Jun 30, 2025 trans-1,2-Dichloroethylene MR No Yes — 0.1 mg/L — Archived Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Jun 30, 2025 cis-1,2-Dichloroethylene MR No Yes — 0.07 mg/L — Archived Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Jun 30, 2025 cis-1,2-Dichloroethylene MR No Yes — 0.07 mg/L — Archived Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Jun 30, 2025 1,2-Dichloroethane MR No Yes — 0.005 mg/L — Archived Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Jun 30, 2025 1,1,2-Trichloroethane MR No Yes — 0.005 mg/L — Archived Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Jun 30, 2025 Carbon tetrachloride MR No Yes — 0.005 mg/L — Archived Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Jun 30, 2025 Toluene MR No Yes — 1 mg/L — Archived Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Jun 30, 2025 DICHLOROMETHANE MR No Yes — 0.005 mg/L — Archived Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Jun 30, 2025 o-Dichlorobenzene MR No Yes — 0.6 mg/L — Archived Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Jun 30, 2025 Vinyl chloride MR No Yes — 0.002 mg/L — Archived Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Jun 30, 2025 Vinyl chloride MR No Yes — 0.002 mg/L — Archived Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Jun 30, 2025 Tetrachloroethylene MR No Yes — 0.005 mg/L — Archived Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Jun 30, 2025 DICHLOROMETHANE MR No Yes — 0.005 mg/L — Archived Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Jun 30, 2025 Ethylbenzene MR No Yes — 0.7 mg/L — Archived Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Jun 30, 2025 1,2-Dichloropropane MR No Yes — 0.005 mg/L — Archived Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Jun 30, 2025 p-Dichlorobenzene MR No Yes — 0.075 mg/L — Archived Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Apr 30, 2025 Chlorine MR No Yes — 4.0 mg/L — Resolved Apr 30, 2025 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2025 Jun 30, 2025 1,2-Dichloropropane MR No Yes — 0.005 mg/L — Archived Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Jun 30, 2025 1,1,1-Trichloroethane MR No Yes — 0.2 mg/L — Archived Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Jun 30, 2025 CHLOROBENZENE MR No Yes — 0.1 mg/L — Archived Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Jun 30, 2025 CHLOROBENZENE MR No Yes — 0.1 mg/L — Archived Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Jun 30, 2025 trans-1,2-Dichloroethylene MR No Yes — 0.1 mg/L — Archived Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Jun 30, 2025 Xylenes, Total MR No Yes — 10 mg/L — Archived Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Jun 30, 2025 Xylenes, Total MR No Yes — 10 mg/L — Archived Jun 30, 2025 Volatile Organic Chemicals
Apr 1, 2025 Apr 30, 2025 Chlorine MR No Yes — 4.0 mg/L — Resolved Apr 30, 2025 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 17, 2024 — LEAD AND COPPER RULE REVISIONS RPT No No — — — Resolved Oct 21, 2024 Lead and Copper Rule Revisions
Oct 17, 2024 — LEAD AND COPPER RULE REVISIONS RPT No No — — — Resolved Oct 21, 2024 Lead and Copper Rule Revisions
Oct 17, 2024 — LEAD AND COPPER RULE REVISIONS TT Yes No — — — Resolved Oct 21, 2024 Lead and Copper Rule Revisions
Oct 17, 2024 — LEAD AND COPPER RULE REVISIONS TT Yes No — — — Resolved Oct 21, 2024 Lead and Copper Rule Revisions

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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