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KNOLLCREST TAX DISTRICT

Connecticut — Community Water System — PWSID: CT0910081

System Information

PWSIDCT0910081
System NameKNOLLCREST TAX DISTRICT
System TypeCommunity Water System
Water SourceGround Water
Activity StatusActive
Owner TypeLocal
EPA Region01
Serves SchoolNo
WholesalerNo
First ReportedMar 8, 1979
Last ReportedDec 15, 2025

Location & Contact

StateConnecticut
CityNEW FAIRFIELD
ZIP Code06812
AddressP.O. BOX 8053
OrganizationCRONK, MARK S.
Phone203-746-1356

Population & Service

Population Served356
Service Connections89

Drinking Water Violations (163)

This water system has 163 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 — Consumer Confidence Rule Other No No — — — Resolved Sep 8, 2025 Consumer Confidence Rule
May 3, 2025 — Public Notice Other No No — — — Resolved Jul 22, 2025 Public Notice Rule and Revised PN Rule
May 3, 2025 — Public Notice Other No No — — — Resolved Jul 22, 2025 Public Notice Rule and Revised PN Rule
Oct 17, 2024 — LEAD AND COPPER RULE REVISIONS TT Yes No — — — Unaddressed — Lead and Copper Rule Revisions
Aug 10, 2024 — Consumer Confidence Rule Other No No — — — Resolved Sep 15, 2024 Consumer Confidence Rule
Aug 10, 2024 — Consumer Confidence Rule Other No No — — — Resolved Sep 15, 2024 Consumer Confidence Rule
Jul 1, 2024 — Consumer Confidence Rule Other No No — — — Resolved Sep 15, 2024 Consumer Confidence Rule
Jul 1, 2024 — Consumer Confidence Rule Other No No — — — Resolved Sep 15, 2024 Consumer Confidence Rule
Dec 30, 2023 — Lead and Copper Rule MR No No — TT — Resolved Jul 26, 2023 Lead and Copper Rule
Dec 30, 2023 — Lead and Copper Rule MR No No — TT — Resolved Jul 26, 2023 Lead and Copper Rule
Dec 1, 2023 Dec 31, 2023 Revised Total Coliform Rule MON No Yes — — — Resolved Dec 31, 2023 Revised Total Coliform Rule
Dec 1, 2023 Dec 31, 2023 Revised Total Coliform Rule MON No Yes — — — Resolved Dec 31, 2023 Revised Total Coliform Rule
Dec 1, 2023 Dec 31, 2023 Revised Total Coliform Rule MON No Yes — — — Resolved Dec 31, 2023 Revised Total Coliform Rule
Dec 1, 2023 Dec 31, 2023 Revised Total Coliform Rule MON No Yes — — — Resolved Dec 31, 2023 Revised Total Coliform Rule
Oct 30, 2023 — Revised Total Coliform Rule TT Yes No — — — Resolved Oct 30, 2023 Revised Total Coliform Rule
Oct 30, 2023 — Revised Total Coliform Rule TT Yes No — — — Resolved Oct 30, 2023 Revised Total Coliform Rule
Oct 30, 2023 — Revised Total Coliform Rule TT Yes No — — — Resolved Oct 30, 2023 Revised Total Coliform Rule
Oct 30, 2023 — Revised Total Coliform Rule TT Yes No — — — Resolved Oct 30, 2023 Revised Total Coliform Rule
Oct 2, 2023 — Public Notice Other No No — — — Resolved Dec 5, 2023 Public Notice Rule and Revised PN Rule
Oct 2, 2023 — Public Notice Other No No — — — Resolved Dec 5, 2023 Public Notice Rule and Revised PN Rule
Jul 1, 2023 — Consumer Confidence Rule Other No No — — — Resolved Jun 28, 2023 Consumer Confidence Rule
Jul 1, 2023 Jul 31, 2023 Revised Total Coliform Rule MCL Yes No — — — Resolved Jul 31, 2023 Revised Total Coliform Rule
Jul 1, 2023 Jul 31, 2023 Revised Total Coliform Rule MCL Yes No — — — Resolved Jul 31, 2023 Revised Total Coliform Rule
Jul 1, 2023 Jul 31, 2023 Revised Total Coliform Rule MCL Yes No — — — Resolved Jul 31, 2023 Revised Total Coliform Rule
Jul 1, 2023 Jul 31, 2023 Revised Total Coliform Rule MCL Yes No — — — Resolved Jul 31, 2023 Revised Total Coliform Rule
Jul 1, 2023 — Consumer Confidence Rule Other No No — — — Resolved Jun 28, 2023 Consumer Confidence Rule
Jan 1, 2023 Mar 31, 2023 Revised Total Coliform Rule MON No Yes — — — Resolved Mar 31, 2023 Revised Total Coliform Rule
Jan 1, 2023 Mar 31, 2023 Revised Total Coliform Rule MON No Yes — — — Resolved Mar 31, 2023 Revised Total Coliform Rule
Jan 1, 2023 Mar 31, 2023 Revised Total Coliform Rule MON No Yes — — — Resolved Mar 31, 2023 Revised Total Coliform Rule
Jan 1, 2023 Mar 31, 2023 Revised Total Coliform Rule MON No Yes — — — Resolved Mar 31, 2023 Revised Total Coliform Rule
Dec 30, 2019 — Lead and Copper Rule MR No No — TT — Resolved Feb 7, 2020 Lead and Copper Rule
Dec 30, 2019 — Lead and Copper Rule MR No No — TT — Resolved Feb 7, 2020 Lead and Copper Rule
Mar 17, 2018 — Public Notice Other No No — — — Resolved Apr 23, 2018 Public Notice Rule and Revised PN Rule
Mar 17, 2018 — Public Notice Other No No — — — Resolved Apr 23, 2018 Public Notice Rule and Revised PN Rule
Jul 1, 2017 — Consumer Confidence Rule Other No No — — — Resolved Jul 14, 2017 Consumer Confidence Rule
Jul 1, 2017 — Consumer Confidence Rule Other No No — — — Resolved Jul 14, 2017 Consumer Confidence Rule
Apr 1, 2017 Jun 30, 2017 Simazine MR No Yes — 0.004 mg/L — Resolved Jun 30, 2017 Synthetic Organic Chemicals
Apr 1, 2017 Jun 30, 2017 Simazine MR No Yes — 0.004 mg/L — Resolved Jun 30, 2017 Synthetic Organic Chemicals
Apr 1, 2017 Jun 30, 2017 OXAMYL MR No Yes — 0.2 mg/L — Resolved Jun 30, 2017 Synthetic Organic Chemicals
Apr 1, 2017 Jun 30, 2017 OXAMYL MR No Yes — 0.2 mg/L — Resolved Jun 30, 2017 Synthetic Organic Chemicals
Apr 1, 2017 Jun 30, 2017 Aldicarb sulfone MR No Yes — — — Resolved Jun 30, 2017 Synthetic Organic Chemicals
Apr 1, 2017 Jun 30, 2017 Carbofuran MR No Yes — 0.04 mg/L — Resolved Jun 30, 2017 Synthetic Organic Chemicals
Apr 1, 2017 Jun 30, 2017 Chlordane MR No Yes — 0.002 mg/L — Resolved Jun 30, 2017 Synthetic Organic Chemicals
Apr 1, 2017 Jun 30, 2017 Benzo(a)pyrene MR No Yes — 0.0002 mg/L — Resolved Jun 30, 2017 Synthetic Organic Chemicals
Apr 1, 2017 Jun 30, 2017 Benzo(a)pyrene MR No Yes — 0.0002 mg/L — Resolved Jun 30, 2017 Synthetic Organic Chemicals
Apr 1, 2017 Jun 30, 2017 Pentachlorophenol MR No Yes — 0.001 mg/L — Resolved Jun 30, 2017 Synthetic Organic Chemicals
Apr 1, 2017 Jun 30, 2017 Chlordane MR No Yes — 0.002 mg/L — Resolved Jun 30, 2017 Synthetic Organic Chemicals
Apr 1, 2017 Jun 30, 2017 Picloram MR No Yes — 0.5 mg/L — Resolved Jun 30, 2017 Synthetic Organic Chemicals
Apr 1, 2017 Jun 30, 2017 Gross Alpha, Excl. Radon and U MR No Yes — 15 pCi/L — Resolved Jun 30, 2017 Radionuclides and Revised Rad Rule
Apr 1, 2017 Jun 30, 2017 Gross Alpha, Excl. Radon and U MR No Yes — 15 pCi/L — Resolved Jun 30, 2017 Radionuclides and Revised Rad 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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