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SCUA Bylas

Arizona — Community Water System — PWSID: 090400110

System Information

PWSID090400110
System NameSCUA Bylas
System TypeCommunity Water System
Water SourceGround Water
Activity StatusActive
Owner TypeNative American
EPA Region09
Serves SchoolNo
WholesalerNo
First ReportedFeb 2, 1984
Last ReportedDec 31, 2025

Location & Contact

StateArizona
CitySan Carlos
ZIP Code85550
AddressP.O. Box O
OrganizationSan Carlos Apache Tribe
Phone9284752631

Population & Service

Population Served3,160
Service Connections573

Drinking Water Violations (516)

This water system has 516 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
Jul 1, 2025 Sep 30, 2025 Vinyl chloride MR No Yes — 0.002 mg/L — Archived Sep 30, 2025 Volatile Organic Chemicals
Jul 1, 2025 Sep 30, 2025 Benzene MR No Yes — 0.005 mg/L — Archived Sep 30, 2025 Volatile Organic Chemicals
Jul 1, 2025 Sep 30, 2025 1,1,1-Trichloroethane MR No Yes — 0.2 mg/L — Archived Sep 30, 2025 Volatile Organic Chemicals
Jul 1, 2025 Sep 30, 2025 trans-1,2-Dichloroethylene MR No Yes — 0.1 mg/L — Archived Sep 30, 2025 Volatile Organic Chemicals
Jul 1, 2025 Sep 30, 2025 1,2,4-Trichlorobenzene MR No Yes — 0.07 mg/L — Archived Sep 30, 2025 Volatile Organic Chemicals
Jul 1, 2025 Sep 30, 2025 Chlorine MR No Yes — 4.0 mg/L — Archived Sep 30, 2025 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2025 Sep 30, 2025 Styrene MR No Yes — 0.1 mg/L — Archived Sep 30, 2025 Volatile Organic Chemicals
Jul 1, 2025 Sep 30, 2025 DICHLOROMETHANE MR No Yes — 0.005 mg/L — Archived Sep 30, 2025 Volatile Organic Chemicals
Jul 1, 2025 Sep 30, 2025 Gross Alpha, Excl. Radon and U MR No Yes — 15 pCi/L — Archived Sep 30, 2025 Radionuclides and Revised Rad Rule
Jul 1, 2025 Sep 30, 2025 Combined Uranium MR No Yes — 30 ug/L — Archived Sep 30, 2025 Radionuclides and Revised Rad Rule
Jul 1, 2025 Sep 30, 2025 1,2-Dichloropropane MR No Yes — 0.005 mg/L — Archived Sep 30, 2025 Volatile Organic Chemicals
Jul 1, 2025 Sep 30, 2025 1,2-Dichloroethane MR No Yes — 0.005 mg/L — Archived Sep 30, 2025 Volatile Organic Chemicals
Jul 1, 2025 Sep 30, 2025 cis-1,2-Dichloroethylene MR No Yes — 0.07 mg/L — Archived Sep 30, 2025 Volatile Organic Chemicals
Jul 1, 2025 Sep 30, 2025 Trichloroethylene MR No Yes — 0.005 mg/L — Archived Sep 30, 2025 Volatile Organic Chemicals
Jul 1, 2025 Sep 30, 2025 1,1-Dichloroethylene MR No Yes — 0.007 mg/L — Archived Sep 30, 2025 Volatile Organic Chemicals
Jul 1, 2025 Sep 30, 2025 Ethylbenzene MR No Yes — 0.7 mg/L — Archived Sep 30, 2025 Volatile Organic Chemicals
Jul 1, 2025 Sep 30, 2025 Toluene MR No Yes — 1 mg/L — Archived Sep 30, 2025 Volatile Organic Chemicals
Jul 1, 2025 Sep 30, 2025 p-Dichlorobenzene MR No Yes — 0.075 mg/L — Archived Sep 30, 2025 Volatile Organic Chemicals
Jul 1, 2025 Sep 30, 2025 Xylenes, Total MR No Yes — 10 mg/L — Archived Sep 30, 2025 Volatile Organic Chemicals
Jul 1, 2025 Sep 30, 2025 Tetrachloroethylene MR No Yes — 0.005 mg/L — Archived Sep 30, 2025 Volatile Organic Chemicals
Jul 1, 2025 Sep 30, 2025 1,1,2-Trichloroethane MR No Yes — 0.005 mg/L — Archived Sep 30, 2025 Volatile Organic Chemicals
Jul 1, 2025 Sep 30, 2025 Combined Radium (-226 and -228) MR No Yes — 5 pCi/L — Archived Sep 30, 2025 Radionuclides and Revised Rad Rule
Jul 1, 2025 Sep 30, 2025 Carbon tetrachloride MR No Yes — 0.005 mg/L — Archived Sep 30, 2025 Volatile Organic Chemicals
Jul 1, 2025 Sep 30, 2025 CHLOROBENZENE MR No Yes — 0.1 mg/L — Archived Sep 30, 2025 Volatile Organic Chemicals
Jul 1, 2025 Sep 30, 2025 o-Dichlorobenzene MR No Yes — 0.6 mg/L — Archived Sep 30, 2025 Volatile Organic Chemicals
May 28, 2025 Jun 30, 2025 Surface Water Treatment Rule TT Yes No — — — Resolved Jun 26, 2025 Surface Water Treatment Rule
May 28, 2025 Jun 30, 2025 Surface Water Treatment Rule TT Yes No — — — Resolved Jun 26, 2025 Surface Water Treatment Rule
May 28, 2025 Jun 30, 2025 Surface Water Treatment Rule TT Yes No — — — Resolved Jun 26, 2025 Surface Water Treatment Rule
Nov 16, 2024 — LEAD AND COPPER RULE REVISIONS RPT No No — — — Unaddressed — Lead and Copper Rule Revisions
Nov 16, 2024 — LEAD AND COPPER RULE REVISIONS RPT No No — — — Unaddressed — Lead and Copper Rule Revisions
Aug 1, 2024 Aug 31, 2024 Revised Total Coliform Rule MCL Yes No — — — Resolved Aug 31, 2024 Revised Total Coliform Rule
Jul 1, 2024 Sep 30, 2024 Chlorine MR No Yes — 4.0 mg/L — Resolved Sep 30, 2024 Stage 1 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2024 Jun 30, 2024 Chlorine MR No Yes — 4.0 mg/L — Resolved Jun 30, 2024 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2024 Mar 31, 2024 Chlorine MR No Yes — 4.0 mg/L — Resolved Mar 31, 2024 Stage 1 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2023 Dec 31, 2023 Chlorine MR No Yes — 4.0 mg/L — Resolved Dec 31, 2023 Stage 1 Disinfectants and Disinfection Byproducts Rule
Jun 1, 2023 — Revised Total Coliform Rule RPT No No — — — Resolved Jul 1, 2023 Revised Total Coliform Rule
May 1, 2023 May 31, 2023 Revised Total Coliform Rule MCL Yes No — — — Resolved May 31, 2023 Revised Total Coliform Rule
May 1, 2023 May 31, 2023 Revised Total Coliform Rule MCL Yes No — — — Resolved May 31, 2023 Revised Total Coliform Rule
Mar 4, 2023 — Groundwater Rule TT Yes No — — — Resolved Jul 11, 2025 Ground Water Rule
Mar 4, 2023 — Public Notice Other No No — — — Resolved Jul 1, 2024 Public Notice Rule and Revised PN Rule
Mar 4, 2023 — Public Notice Other No No — — — Resolved Jul 1, 2024 Public Notice Rule and Revised PN Rule
Mar 4, 2023 — Public Notice Other No No — — — Resolved Jul 1, 2024 Public Notice Rule and Revised PN Rule
Mar 4, 2023 — Public Notice Other No No — — — Resolved Jul 1, 2024 Public Notice Rule and Revised PN Rule
Mar 4, 2023 — Groundwater Rule TT Yes No — — — Resolved Nov 8, 2024 Ground Water Rule
Mar 4, 2023 — Groundwater Rule TT Yes No — — — Resolved Apr 15, 2024 Ground Water Rule
Mar 4, 2023 — Groundwater Rule TT Yes No — — — Resolved Jul 11, 2025 Ground Water Rule
Mar 4, 2023 — Groundwater Rule TT Yes No — — — Resolved Apr 15, 2024 Ground Water Rule
Mar 4, 2023 — Public Notice Other No No — — — Resolved Jul 1, 2024 Public Notice Rule and Revised PN Rule
Mar 4, 2023 — Groundwater Rule TT Yes No — — — Resolved Jul 11, 2025 Ground Water Rule
Mar 4, 2023 — Groundwater Rule TT Yes No — — — Resolved Nov 8, 2024 Ground Water 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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