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LOUDOUN WATER - CENTRAL SYSTEM

Virginia — Community Water System — PWSID: VA6107350

System Information

PWSIDVA6107350
System NameLOUDOUN WATER - CENTRAL SYSTEM
System TypeCommunity Water System
Water SourceSurface Water
Activity StatusActive
Owner TypeLocal
EPA Region03
Serves SchoolNo
WholesalerNo
First ReportedFeb 10, 1979
Last ReportedDec 3, 2025

Location & Contact

StateVirginia
CityASHBURN
ZIP Code20146
Address44961 Loudoun Water Way
OrganizationCOGSWELL, CATHERINE
Phone571-291-7844

Population & Service

Population Served334,808
Service Connections83,426

Drinking Water Violations (43)

This water system has 43 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
Oct 1, 2023 — Lead and Copper Rule MR No No — TT — Resolved Jun 25, 2024 Lead and Copper Rule
Oct 1, 2023 — Lead and Copper Rule MR No No — TT — Resolved Jun 25, 2024 Lead and Copper Rule
Oct 1, 2023 — Lead and Copper Rule MR No No — TT — Resolved Jun 25, 2024 Lead and Copper Rule
Oct 1, 2023 — Lead and Copper Rule MR No No — TT — Resolved Jun 25, 2024 Lead and Copper Rule
Jan 1, 2009 — Stage 2 Disinfectants and Disinfection Byproducts Rule MR No No — — — Resolved Dec 2, 2011 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2009 — Stage 2 Disinfectants and Disinfection Byproducts Rule MR No No — — — Resolved Dec 2, 2011 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2001 Dec 31, 2001 Lead and Copper Rule MR No No — TT — Resolved Dec 31, 2001 Lead and Copper Rule
Jul 1, 2001 Dec 31, 2001 Lead and Copper Rule MR No No — TT — Resolved Dec 31, 2001 Lead and Copper Rule
Dec 1, 1993 Dec 31, 1993 Coliform (TCR) MCL Yes No — 5% of samples — Archived Dec 31, 1993 Total Coliform Rule
Dec 1, 1993 Dec 31, 1993 Coliform (TCR) MCL Yes No — 5% of samples — Archived Dec 31, 1993 Total Coliform Rule
Dec 1, 1993 Dec 31, 1993 Coliform (TCR) MCL Yes No — 5% of samples — Archived Dec 31, 1993 Total Coliform Rule
Dec 1, 1993 Dec 31, 1993 Coliform (TCR) MCL Yes No — 5% of samples — Archived Dec 31, 1993 Total Coliform Rule
Feb 1, 1993 Feb 28, 1993 Coliform (TCR) MCL Yes No — 5% of samples — Archived Feb 28, 1993 Total Coliform Rule
Feb 1, 1993 Feb 28, 1993 Coliform (TCR) MCL Yes No — 5% of samples — Archived Feb 28, 1993 Total Coliform Rule
Feb 1, 1993 Feb 28, 1993 Coliform (TCR) MCL Yes No — 5% of samples — Archived Feb 28, 1993 Total Coliform Rule
Dec 1, 1984 Nov 30, 1987 Barium MR No Yes — 2 mg/L — Archived Nov 30, 1987 Inorganic Chemicals
Dec 1, 1984 Nov 30, 1987 Mercury MR No Yes — 0.002 mg/L — Archived Nov 30, 1987 Inorganic Chemicals
Dec 1, 1984 Nov 30, 1987 Fluoride MR No Yes — 4.0 mg/L — Archived Nov 30, 1987 Inorganic Chemicals
Dec 1, 1984 Nov 30, 1987 Fluoride MR No Yes — 4.0 mg/L — Archived Nov 30, 1987 Inorganic Chemicals
Dec 1, 1984 Nov 30, 1987 Fluoride MR No Yes — 4.0 mg/L — Archived Nov 30, 1987 Inorganic Chemicals
Dec 1, 1984 Nov 30, 1987 Cadmium MR No Yes — 0.005 mg/L — Archived Nov 30, 1987 Inorganic Chemicals
Dec 1, 1984 Nov 30, 1987 Cadmium MR No Yes — 0.005 mg/L — Archived Nov 30, 1987 Inorganic Chemicals
Dec 1, 1984 Nov 30, 1987 Cadmium MR No Yes — 0.005 mg/L — Archived Nov 30, 1987 Inorganic Chemicals
Dec 1, 1984 Nov 30, 1987 Barium MR No Yes — 2 mg/L — Archived Nov 30, 1987 Inorganic Chemicals
Dec 1, 1984 Nov 30, 1987 Mercury MR No Yes — 0.002 mg/L — Archived Nov 30, 1987 Inorganic Chemicals
Dec 1, 1984 Nov 30, 1987 Mercury MR No Yes — 0.002 mg/L — Archived Nov 30, 1987 Inorganic Chemicals
Dec 1, 1984 Nov 30, 1987 Selenium MR No Yes — 0.05 mg/L — Archived Nov 30, 1987 Inorganic Chemicals
Dec 1, 1984 Nov 30, 1987 Selenium MR No Yes — 0.05 mg/L — Archived Nov 30, 1987 Inorganic Chemicals
Dec 1, 1984 Nov 30, 1987 Selenium MR No Yes — 0.05 mg/L — Archived Nov 30, 1987 Inorganic Chemicals
Dec 1, 1984 Nov 30, 1987 Arsenic MR No Yes — 0.010 mg/L — Archived Nov 30, 1987 Arsenic Rule
Dec 1, 1984 Nov 30, 1987 Arsenic MR No Yes — 0.010 mg/L — Archived Nov 30, 1987 Arsenic Rule
Dec 1, 1984 Nov 30, 1987 Arsenic MR No Yes — 0.010 mg/L — Archived Nov 30, 1987 Arsenic Rule
Dec 1, 1984 Nov 30, 1987 Nitrate MR No Yes — 10 mg/L — Archived Nov 30, 1987 Nitrate Rule
Dec 1, 1984 Nov 30, 1987 Nitrate MR No Yes — 10 mg/L — Archived Nov 30, 1987 Nitrate Rule
Dec 1, 1984 Nov 30, 1987 Nitrate MR No Yes — 10 mg/L — Archived Nov 30, 1987 Nitrate Rule
Dec 1, 1984 Nov 30, 1987 Chromium MR No Yes — 0.1 mg/L — Archived Nov 30, 1987 Inorganic Chemicals
Dec 1, 1984 Nov 30, 1987 Chromium MR No Yes — 0.1 mg/L — Archived Nov 30, 1987 Inorganic Chemicals
Dec 1, 1984 Nov 30, 1987 Chromium MR No Yes — 0.1 mg/L — Archived Nov 30, 1987 Inorganic Chemicals
Dec 1, 1984 Nov 30, 1987 Barium MR No Yes — 2 mg/L — Archived Nov 30, 1987 Inorganic Chemicals
— — — No No — — — — — —
— — — No No — — — — — —
— — — No No — — — — — —
— — — No No — — — — — —

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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