TapScore

MAYAGUEZ Water Quality Report

Population

151,555

people served

Water Source

🌊 Surface

rivers, lakes, reservoirs

National Rank

—

of 49,184 US systems

5-Year Record

⚠️ 104

violations recorded

F

Unsafe

Safety Grade

104 violations in the past 5 years, including 46 health-based

System Details

PWSID
PR0003283
Population Served
151,555
Water Source
Surface Water
Owner
Local Government
State
Puerto Rico
EPA Region
2

Contaminants of Concern

ContaminantStatusViolations
Contaminant 5000⚠ Monitoring/Reporting5
Contaminant 7000⚠ Monitoring/Reporting5
Total Trihalomethanes (TTHMs)✕ Health-Based33
Contaminant 0100⚠ Monitoring/Reporting34
Contaminant 3015⚠ Monitoring/Reporting34
Total Coliform⚠ Monitoring/Reporting34
Haloacetic Acids (HAA5)✕ Health-Based8
Contaminant 0800✕ Health-Based2
Contaminant 0300✕ Health-Based7
Contaminant 2005⚠ Monitoring/Reporting4
Contaminant 2010⚠ Monitoring/Reporting4
Contaminant 2015⚠ Monitoring/Reporting4
Contaminant 2020⚠ Monitoring/Reporting2
Contaminant 2031⚠ Monitoring/Reporting2
Contaminant 2032⚠ Monitoring/Reporting2
Contaminant 2033⚠ Monitoring/Reporting2
Contaminant 2034⚠ Monitoring/Reporting2
Contaminant 2035⚠ Monitoring/Reporting2
Contaminant 2036⚠ Monitoring/Reporting2
Contaminant 2037⚠ Monitoring/Reporting2
Contaminant 2039⚠ Monitoring/Reporting2
Contaminant 2040⚠ Monitoring/Reporting2
Contaminant 2041⚠ Monitoring/Reporting2
Contaminant 2042⚠ Monitoring/Reporting4
Contaminant 2046⚠ Monitoring/Reporting2
Atrazine⚠ Monitoring/Reporting2
Benzene⚠ Monitoring/Reporting2
Contaminant 2065⚠ Monitoring/Reporting4
Contaminant 2067⚠ Monitoring/Reporting4
Contaminant 2105⚠ Monitoring/Reporting2
Contaminant 2110⚠ Monitoring/Reporting2
Contaminant 2274⚠ Monitoring/Reporting4
Contaminant 2306⚠ Monitoring/Reporting2
Contaminant 2326⚠ Monitoring/Reporting2
Contaminant 2383⚠ Monitoring/Reporting2
Contaminant 2931⚠ Monitoring/Reporting6
Contaminant 2946⚠ Monitoring/Reporting6
Contaminant 2959⚠ Monitoring/Reporting2
Nitrite⚠ Monitoring/Reporting2
Arsenic⚠ Monitoring/Reporting9
Barium⚠ Monitoring/Reporting9
Cadmium⚠ Monitoring/Reporting9
Chromium⚠ Monitoring/Reporting9
Cyanide⚠ Monitoring/Reporting9
Selenium⚠ Monitoring/Reporting9
Beryllium⚠ Monitoring/Reporting9
Contaminant 1075⚠ Monitoring/Reporting9
Contaminant 1085⚠ Monitoring/Reporting9
Thallium⚠ Monitoring/Reporting9

Violation History

2023
7
2022
93
2021
4
2020
8
2019
14
2018
68
2017
96
2016
28
2015
8
2014
5

Total violations on record: 334

Service Area

Cities Served

MAYAGUEZ

ZIP Codes Served

00680

Recommended Water Filters

Based on contaminants detected in this water system:

Reverse Osmosis System

Removes up to 99% of contaminants including PFAS, lead, arsenic, and nitrates

Removes: Arsenic, Nitrite, Cadmium, Chromium, Selenium, Barium

$150–$400

Activated Carbon Filter

Effective for chlorine, THMs, pesticides, and taste/odor improvement

Removes: Total Trihalomethanes (TTHMs), Haloacetic Acids (HAA5), Atrazine, Benzene

$20–$100

Water Distiller

Removes heavy metals, minerals, and most contaminants through evaporation

Removes: Arsenic, Cadmium

$80–$200

UV Water Purifier

Kills bacteria and viruses without chemicals

Removes: Total Coliform

$50–$150

How does this compare?

This systemNational average
Grade F
Avg: B-C
334violations total

1193% of national average

National avg: ~28 per system

🏙️ This is a large system — serving 23× more people than the national average.