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PIEDRAS BLANCAS

PR — Community Water System — PWSID: PR0004474

System Information

PWSIDPR0004474
System NamePIEDRAS BLANCAS
System TypeCommunity Water System
Water SourceGround Water
Activity StatusActive
Owner TypeLocal
EPA Region02
Serves SchoolNo
WholesalerNo
First ReportedJan 18, 1996
Last ReportedDec 23, 2025

Location & Contact

StatePR
CityGUAYANILLA
ZIP Code00656
AddressPR 335 KM. 1.5
OrganizationPIEDRAS BLANCAS
Phone787-620-2277

Population & Service

Population Served3,391
Service Connections1,270

Drinking Water Violations (50)

This water system has 50 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, 2020 — Consumer Confidence Rule Other No No — — — Resolved Aug 7, 2020 Consumer Confidence Rule
Jan 1, 2019 Mar 31, 2019 BHC-GAMMA MR No Yes — 0.0002 mg/L — Resolved Mar 31, 2019 Synthetic Organic Chemicals
Jan 1, 2019 Mar 31, 2019 Heptachlor MR No Yes — 0.0004 mg/L — Resolved Mar 31, 2019 Synthetic Organic Chemicals
Jan 1, 2019 Mar 31, 2019 Atrazine MR No Yes — 0.003 mg/L — Resolved Mar 31, 2019 Synthetic Organic Chemicals
Jan 1, 2019 Mar 31, 2019 Toxaphene MR No Yes — 0.003 mg/L — Resolved Mar 31, 2019 Synthetic Organic Chemicals
Jan 1, 2019 Mar 31, 2019 LASSO MR No Yes — — — Resolved Mar 31, 2019 Synthetic Organic Chemicals
Jan 1, 2019 Mar 31, 2019 Simazine MR No Yes — 0.004 mg/L — Resolved Mar 31, 2019 Synthetic Organic Chemicals
Jan 1, 2019 Mar 31, 2019 Methoxychlor MR No Yes — 0.04 mg/L — Resolved Mar 31, 2019 Synthetic Organic Chemicals
Jan 1, 2019 Mar 31, 2019 Benzo(a)pyrene MR No Yes — 0.0002 mg/L — Resolved Mar 31, 2019 Synthetic Organic Chemicals
Jan 1, 2019 Mar 31, 2019 Di(2-ethylhexyl) adipate MR No Yes — 0.4 mg/L — Resolved Mar 31, 2019 Synthetic Organic Chemicals
Jan 1, 2019 Mar 31, 2019 Chlordane MR No Yes — 0.002 mg/L — Resolved Mar 31, 2019 Synthetic Organic Chemicals
Jan 1, 2019 Mar 31, 2019 Total Polychlorinated Biphenyls (PCB) MR No Yes — 0.0005 mg/L — Resolved Mar 31, 2019 Synthetic Organic Chemicals
Jan 1, 2019 Mar 31, 2019 HEXACHLOROBENZENE MR No Yes — 0.001 mg/L — Resolved Mar 31, 2019 Synthetic Organic Chemicals
Jan 1, 2019 Mar 31, 2019 Heptachlor epoxide MR No Yes — 0.0002 mg/L — Resolved Mar 31, 2019 Synthetic Organic Chemicals
Jan 1, 2019 Mar 31, 2019 Hexachlorocyclopentadiene MR No Yes — 0.05 mg/L — Resolved Mar 31, 2019 Synthetic Organic Chemicals
Jan 1, 2019 Jan 31, 2019 Glyphosate MR No Yes — 0.7 mg/L — Resolved Jan 31, 2019 Synthetic Organic Chemicals
Jan 1, 2019 Mar 31, 2019 Endrin MR No Yes — 0.002 mg/L — Resolved Mar 31, 2019 Synthetic Organic Chemicals
Oct 1, 2018 — Consumer Confidence Rule Other No No — — — Resolved Aug 13, 2019 Consumer Confidence Rule
Oct 1, 2018 — Consumer Confidence Rule Other No No — — — Resolved Aug 13, 2019 Consumer Confidence Rule
Jan 1, 2016 — Lead and Copper Rule MR No No — TT — Resolved Dec 9, 2019 Lead and Copper Rule
Jan 1, 2016 — Lead and Copper Rule MR No No — TT — Resolved Dec 9, 2019 Lead and Copper Rule
Jul 1, 2014 — Consumer Confidence Rule Other No No — — — Resolved Aug 20, 2014 Consumer Confidence Rule
Jul 1, 2014 Sep 30, 2014 TTHM MR No No — 0.080 mg/L — Resolved Sep 30, 2014 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2014 Sep 30, 2014 TTHM MR No No — 0.080 mg/L — Resolved Sep 30, 2014 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2014 Sep 30, 2014 Total Haloacetic Acids (HAA5) MR No No — 0.060 mg/L — Resolved Sep 30, 2014 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2014 Sep 30, 2014 Total Haloacetic Acids (HAA5) MR No No — 0.060 mg/L — Resolved Sep 30, 2014 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2014 Sep 30, 2014 Total Haloacetic Acids (HAA5) MR No No — 0.060 mg/L — Resolved Sep 30, 2014 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2014 Sep 30, 2014 TTHM MR No No — 0.080 mg/L — Resolved Sep 30, 2014 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2014 Apr 30, 2014 Coliform (TCR) MR No No — 5% of samples — Resolved Apr 30, 2014 Total Coliform Rule
Jul 1, 2012 — Lead and Copper Rule MR No No — TT — Resolved Dec 9, 2019 Lead and Copper Rule
Jul 1, 2012 — Lead and Copper Rule MR No No — TT — Resolved Dec 9, 2019 Lead and Copper Rule
Aug 1, 2007 Aug 31, 2007 Coliform (TCR) MCL Yes No — 5% of samples — Resolved Aug 31, 2007 Total Coliform Rule
Apr 1, 2007 Jun 30, 2007 Chlordane MR No Yes — 0.002 mg/L — Resolved Jun 30, 2007 Synthetic Organic Chemicals
Apr 1, 2007 Jun 30, 2007 HEXACHLOROBENZENE MR No Yes — 0.001 mg/L — Resolved Jun 30, 2007 Synthetic Organic Chemicals
Apr 1, 2007 Jun 30, 2007 Total Polychlorinated Biphenyls (PCB) MR No Yes — 0.0005 mg/L — Resolved Jun 30, 2007 Synthetic Organic Chemicals
Apr 1, 2007 Jun 30, 2007 BHC-GAMMA MR No Yes — 0.0002 mg/L — Resolved Jun 30, 2007 Synthetic Organic Chemicals
Apr 1, 2007 Jun 30, 2007 Heptachlor MR No Yes — 0.0004 mg/L — Resolved Jun 30, 2007 Synthetic Organic Chemicals
Apr 1, 2007 Jun 30, 2007 Toxaphene MR No Yes — 0.003 mg/L — Resolved Jun 30, 2007 Synthetic Organic Chemicals
Apr 1, 2007 Jun 30, 2007 Heptachlor epoxide MR No Yes — 0.0002 mg/L — Resolved Jun 30, 2007 Synthetic Organic Chemicals
Apr 1, 2007 Jun 30, 2007 Methoxychlor MR No Yes — 0.04 mg/L — Resolved Jun 30, 2007 Synthetic Organic Chemicals
Apr 1, 2007 Jun 30, 2007 Endrin MR No Yes — 0.002 mg/L — Resolved Jun 30, 2007 Synthetic Organic Chemicals
May 1, 2005 May 31, 2005 Coliform (TCR) MCL Yes No — 5% of samples — Archived May 31, 2005 Total Coliform Rule
Apr 1, 2005 Apr 30, 2005 Coliform (TCR) MCL Yes No — 5% of samples — Archived Apr 30, 2005 Total Coliform Rule
Nov 1, 2003 Nov 30, 2003 Coliform (TCR) MR No No — 5% of samples — Archived Nov 30, 2003 Total Coliform Rule
Jun 1, 2003 Jun 30, 2003 Coliform (TCR) MCL Yes No — 5% of samples — Archived Jun 30, 2003 Total Coliform Rule
Feb 1, 2001 Feb 28, 2001 Coliform (TCR) MCL Yes No — 5% of samples — Archived Feb 28, 2001 Total Coliform Rule
Sep 1, 1998 Sep 30, 1998 Coliform (TCR) MR No No — 5% of samples — Archived Sep 30, 1998 Total Coliform Rule
Jun 1, 1998 Jun 30, 1998 Coliform (TCR) MCL Yes No — 5% of samples — Archived Jun 30, 1998 Total Coliform Rule
Jun 1, 1998 Jun 30, 1998 Coliform (TCR) MCL Yes No — 5% of samples — Archived Jun 30, 1998 Total Coliform Rule
— — — 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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