Mayaguez Water Quality
Puerto Rico
According to EPA SDWIS, Mayaguez, Puerto Rico is served by 3 community water systems covering about 165,048 people. The same extract lists 46 health-based violation records, most recently coded 2950 in 2023. Counts are historical EPA registry rows, not a current compliance or drinkability score.
Drinking water in Mayaguez, Puerto Rico is delivered through 3 EPA-regulated community water systems serving an estimated 165,048 people. Each system is tracked in the EPA Safe Drinking Water Information System (SDWIS) under the Safe Drinking Water Act, which requires testing for regulated contaminants, consumer notification of violations, and publication of an annual Consumer Confidence Report.
PlainEnviro's health-based SDWIS extract shows 46 violation records across the 3 active community systems shown here. Monitoring and reporting records are not present in the extract. The records carry 4 distinct EPA contaminant codes: TTHM, Interim Enhanced Surface Water Treatment Rule, Long Term 2 Enhanced Surface Water Treatment Rule, Total Haloacetic Acids (HAA5). 2 TRI-reporting industrial facilities are also located within the city limits.
A past EPA health-based registry row does not describe water delivered today or current compliance status; utilities notify customers and remediate under state primacy oversight when required. For current water-quality status and treatment practices, review your local utility's most recent Consumer Confidence Report or contact the Puerto Rico drinking water program. All records above reflect federal EPA SDWIS data and are not independently verified against state databases.
Community Water Systems
| System Name | Pop. Served | Violations | Status |
|---|---|---|---|
| MAYAGUEZ | 152,342 | 46 | Health |
| PONCE DE LEON | 11,139 | 0 | Clean |
| CONSUMO | 1,567 | 0 | Clean |
Does this city have health-based water violations?
These health-based records can represent Maximum Contaminant Level (MCL), Treatment Technique (TT), or Maximum Residual Disinfectant Level (MRDL) categories. A historical record does not establish that water is currently unsafe.
| Water system | Contaminant | Begin Date |
|---|---|---|
| MAYAGUEZ | TTHM | 2023-04-01 |
| MAYAGUEZ | TTHM | 2023-04-01 |
| MAYAGUEZ | TTHM | 2023-04-01 |
| MAYAGUEZ | TTHM | 2023-01-01 |
| MAYAGUEZ | TTHM | 2023-01-01 |
| MAYAGUEZ | TTHM | 2023-01-01 |
| MAYAGUEZ | TTHM | 2023-01-01 |
| MAYAGUEZ | Interim Enhanced Surface Water Treatment Rule | 2022-09-01 |
| MAYAGUEZ | Interim Enhanced Surface Water Treatment Rule | 2022-09-01 |
| MAYAGUEZ | Interim Enhanced Surface Water Treatment Rule | 2022-09-01 |
| MAYAGUEZ | TTHM | 2018-10-01 |
| MAYAGUEZ | TTHM | 2018-10-01 |
| MAYAGUEZ | Long Term 2 Enhanced Surface Water Treatment Rule | 2018-05-16 |
| MAYAGUEZ | Long Term 2 Enhanced Surface Water Treatment Rule | 2018-05-16 |
| MAYAGUEZ | Interim Enhanced Surface Water Treatment Rule | 2017-06-01 |
| MAYAGUEZ | Interim Enhanced Surface Water Treatment Rule | 2017-06-01 |
| MAYAGUEZ | Interim Enhanced Surface Water Treatment Rule | 2017-06-01 |
| MAYAGUEZ | Interim Enhanced Surface Water Treatment Rule | 2017-06-01 |
| MAYAGUEZ | TTHM | 2017-01-01 |
| MAYAGUEZ | TTHM | 2017-01-01 |
| MAYAGUEZ | TTHM | 2016-10-01 |
| MAYAGUEZ | TTHM | 2016-10-01 |
| MAYAGUEZ | Total Haloacetic Acids (HAA5) | 2016-07-01 |
| MAYAGUEZ | Total Haloacetic Acids (HAA5) | 2016-07-01 |
| MAYAGUEZ | TTHM | 2016-07-01 |
| MAYAGUEZ | TTHM | 2016-07-01 |
| MAYAGUEZ | TTHM | 2016-04-01 |
| MAYAGUEZ | TTHM | 2016-04-01 |
| MAYAGUEZ | Total Haloacetic Acids (HAA5) | 2016-04-01 |
| MAYAGUEZ | Total Haloacetic Acids (HAA5) | 2016-04-01 |
| MAYAGUEZ | Total Haloacetic Acids (HAA5) | 2016-01-01 |
| MAYAGUEZ | Total Haloacetic Acids (HAA5) | 2016-01-01 |
| MAYAGUEZ | TTHM | 2016-01-01 |
| MAYAGUEZ | TTHM | 2016-01-01 |
| MAYAGUEZ | TTHM | 2015-10-01 |
| MAYAGUEZ | TTHM | 2015-10-01 |
| MAYAGUEZ | TTHM | 2015-07-01 |
| MAYAGUEZ | TTHM | 2015-07-01 |
| MAYAGUEZ | TTHM | 2015-04-01 |
| MAYAGUEZ | TTHM | 2015-04-01 |
| MAYAGUEZ | TTHM | 2015-01-01 |
| MAYAGUEZ | TTHM | 2015-01-01 |
| MAYAGUEZ | TTHM | 2014-10-01 |
| MAYAGUEZ | TTHM | 2014-10-01 |
| MAYAGUEZ | TTHM | 2014-07-01 |
| MAYAGUEZ | TTHM | 2014-07-01 |
What are Mayaguez's health-based records for?
Mayaguez's health-based violation records carry 4 distinct EPA codes: some name a substance, others the drinking-water rule that was breached. Counts are records on file in the EPA SDWIS extract, not current test results.
| Contaminant | Records | Systems |
|---|---|---|
| Tthm | 31 | 1 |
| Interim Enhanced Surface Water Treatment Rule | 7 | 1 |
| Total Haloacetic Acids (HAA5) | 6 | 1 |
| Long Term 2 Enhanced Surface Water Treatment Rule | 2 | 1 |
TRI Facilities in Mayaguez
| Facility | Total Releases |
|---|---|
| Compania Cervecera de Puerto Rico Inc. | 52.7K lbs |
| Mayaguez Gas Turbines Power Plant | 502 lbs |
Frequently Asked Questions
What does EPA SDWIS list for drinking water in Mayaguez, Puerto Rico? ▼
How many water violations does Mayaguez have in this EPA extract? ▼
What contaminants were found in Mayaguez water? ▼
How many water systems serve Mayaguez? ▼
Where does Mayaguez get its drinking water? ▼
Are there pollution sources near Mayaguez? ▼
How does Mayaguez compare in Puerto Rico?
Of the 69 Puerto Rico places with at least one community water system on file, Mayaguez ranks #42 by number of systems (3).
Either side of it: Canovanas (3), Maricao (3), Morovis (3), Rio Grande (3)
About This Data
Figures here are the current EPA SDWIS extract joined to the 3 community water systems whose service area lists Mayaguez, ranked against the 69 Puerto Rico places with at least one system on file. Data current as of 2026-08-25.
Water system data comes from the EPA's Safe Drinking Water Information System (SDWIS). PlainEnviro's violation fetch is restricted upstream to records EPA flags as health-based and then joined to active community water systems. Monitoring and reporting violations are not included.
A health-based violation row in this extract is a historical EPA registry entry. It does not describe water delivered today or current compliance status. Many records are later resolved, and public water systems notify customers when required. For current conditions, contact your local water utility or the state drinking water program.
TRI facility data comes from the EPA Toxic Release Inventory. Facilities shown are those that self-report to the TRI program. PlainEnviro presents this data without advocacy framing.
Read our methodology - how this data is sourced, computed, and verified.