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RIO BLANCO,VIEQUES,CULEDRA

PR — Community Water System — PWSID: PR0005386

System Information

PWSIDPR0005386
System NameRIO BLANCO,VIEQUES,CULEDRA
System TypeCommunity Water System
Water SourceSurface Water
Activity StatusActive
Owner TypeLocal
EPA Region02
Serves SchoolNo
WholesalerNo
First ReportedAug 15, 1988
Last ReportedDec 23, 2025

Location & Contact

StatePR
CityNAGUABO
ZIP Code00718
AddressCARR. 31 KM. 9.9
OrganizationRIO BLANCO,VIEQUES,CULEDRA
Phone787-620-2277

Population & Service

Population Served80,759
Service Connections30,247

Drinking Water Violations (643)

This water system has 643 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
Jun 1, 2021 Jun 30, 2021 Interim Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved Jun 30, 2021 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Jun 1, 2021 Jun 30, 2021 Interim Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved Jun 30, 2021 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Jul 1, 2020 Sep 30, 2020 Total Haloacetic Acids (HAA5) MCL Yes No .062 MG/L 0.060 mg/L .06 Resolved Sep 30, 2020 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2020 Sep 30, 2020 TTHM MCL Yes No .091 MG/L 0.080 mg/L .08 Resolved Sep 30, 2020 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2020 — Consumer Confidence Rule Other No No — — — Resolved Jul 29, 2020 Consumer Confidence Rule
Jul 1, 2020 Sep 30, 2020 Total Haloacetic Acids (HAA5) MCL Yes No .062 MG/L 0.060 mg/L .06 Resolved Sep 30, 2020 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2020 Sep 30, 2020 TTHM MCL Yes No .091 MG/L 0.080 mg/L .08 Resolved Sep 30, 2020 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2020 Jun 30, 2020 TTHM MCL Yes No .101 MG/L 0.080 mg/L .08 Resolved Jun 30, 2020 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2020 Jun 30, 2020 TTHM MCL Yes No .101 MG/L 0.080 mg/L .08 Resolved Jun 30, 2020 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2020 Jun 30, 2020 Total Haloacetic Acids (HAA5) MCL Yes No .062 MG/L 0.060 mg/L .06 Resolved Jun 30, 2020 Stage 2 Disinfectants and Disinfection Byproducts Rule
Mar 1, 2020 Mar 31, 2020 Interim Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved Mar 31, 2020 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Feb 1, 2020 Feb 29, 2020 Surface Water Treatment Rule MR No No — — — Resolved Feb 29, 2020 Surface Water Treatment Rule
Jan 1, 2020 Mar 31, 2020 TTHM MCL Yes No .095 MG/L 0.080 mg/L .08 Resolved Mar 31, 2020 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2020 Mar 31, 2020 TTHM MCL Yes No .095 MG/L 0.080 mg/L .08 Resolved Mar 31, 2020 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2020 Mar 31, 2020 Total Haloacetic Acids (HAA5) MCL Yes No .061 MG/L 0.060 mg/L .06 Resolved Mar 31, 2020 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2019 Dec 31, 2019 TTHM MCL Yes No .09 MG/L 0.080 mg/L .08 Resolved Dec 31, 2019 Stage 2 Disinfectants and Disinfection Byproducts Rule
Oct 1, 2019 Dec 31, 2019 TTHM MCL Yes No .09 MG/L 0.080 mg/L .08 Resolved Dec 31, 2019 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jul 1, 2019 Jul 31, 2019 Interim Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved Jul 31, 2019 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Jul 1, 2019 Jul 31, 2019 Interim Enhanced Surface Water Treatment Rule TT Yes No — — — Resolved Jul 31, 2019 Interim and Long Term 1 Enhanced Surface Water Treatment Rule
Apr 1, 2019 Jun 30, 2019 TTHM MCL Yes No .085 MG/L 0.080 mg/L .08 Resolved Jun 30, 2019 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2019 Jun 30, 2019 TTHM MCL Yes No .085 MG/L 0.080 mg/L .08 Resolved Jun 30, 2019 Stage 2 Disinfectants and Disinfection Byproducts Rule
Apr 1, 2019 Jun 30, 2019 TTHM MCL Yes No .085 MG/L 0.080 mg/L .08 Resolved Jun 30, 2019 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2019 Mar 31, 2019 Methoxychlor MR No Yes — 0.04 mg/L — Resolved Mar 31, 2019 Synthetic Organic Chemicals
Jan 1, 2019 Jan 31, 2019 Benzo(a)pyrene MR No Yes — 0.0002 mg/L — Resolved Jan 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 Hexachlorocyclopentadiene MR No Yes — 0.05 mg/L — Resolved Mar 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
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 TTHM MCL Yes No .081 MG/L 0.080 mg/L — Resolved Mar 31, 2019 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2019 Mar 31, 2019 Chlordane MR No Yes — 0.002 mg/L — Resolved Mar 31, 2019 Synthetic Organic Chemicals
Jan 1, 2019 Jan 31, 2019 Di(2-ethylhexyl) adipate MR No Yes — 0.4 mg/L — Resolved Jan 31, 2019 Synthetic Organic Chemicals
Jan 1, 2019 Jan 31, 2019 Atrazine MR No Yes — 0.003 mg/L — Resolved Jan 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 BHC-GAMMA MR No Yes — 0.0002 mg/L — 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 Heptachlor epoxide MR No Yes — 0.0002 mg/L — Resolved Mar 31, 2019 Synthetic Organic Chemicals
Jan 1, 2019 Mar 31, 2019 TTHM MCL Yes No .081 MG/L 0.080 mg/L — Resolved Mar 31, 2019 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2019 Mar 31, 2019 TTHM MCL Yes No .081 MG/L 0.080 mg/L — Resolved Mar 31, 2019 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2019 Mar 31, 2019 TTHM MCL Yes No .081 MG/L 0.080 mg/L — Resolved Mar 31, 2019 Stage 2 Disinfectants and Disinfection Byproducts Rule
Jan 1, 2019 Mar 31, 2019 LASSO MR No Yes — — — 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
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
Jul 1, 2017 Jul 31, 2017 E. COLI MR No Yes — — — Resolved Jul 31, 2017 Long Term 2 Enhanced Surface Water Treatment Rule
Jul 1, 2017 Jul 31, 2017 E. COLI MR No Yes — — — Resolved Jul 31, 2017 Long Term 2 Enhanced Surface Water Treatment Rule
Jul 1, 2017 Jul 31, 2017 Cryptosporidium MR No Yes — — — Resolved Jul 31, 2017 Long Term 2 Enhanced Surface Water Treatment Rule
Jul 1, 2017 Jul 31, 2017 Turbidity MR No Yes — TT — Resolved Jul 31, 2017 Long Term 2 Enhanced Surface Water Treatment Rule
Jul 1, 2017 Jul 31, 2017 Cryptosporidium MR No Yes — — — Resolved Jul 31, 2017 Long Term 2 Enhanced Surface Water Treatment Rule
Jul 1, 2017 Jul 31, 2017 Cryptosporidium MR No Yes — — — Resolved Jul 31, 2017 Long Term 2 Enhanced Surface Water Treatment Rule
Jul 1, 2017 Jul 31, 2017 Turbidity MR No Yes — TT — Resolved Jul 31, 2017 Long Term 2 Enhanced Surface Water Treatment 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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