Public water system record
Mayaguez
Serves an area of Mayagüez Municipio and Añasco Municipio, PR that includes Mayagüez and Añasco · 151,555 people served
Federal records show 7 health-based violations and 122 monitoring/reporting issues for Mayaguez in the last ten years. The most serious issue in this window was a resolved Interim Enhanced Surface Water Treatment Rule violation.
System profile
Source water
Surface water
ZIP
00680
EPA system ID
PR0003283
- Health-based violations, last 10 years
- 7
- Resolved
- 7
- Unresolved
- 0
- Any acute record
- Yes
- Monitoring issues, last 10 years
- 122
Key facts
- Mayaguez draws water from 14 wells and 2 surface water intakes (2 of them for emergency, seasonal or other part-time use).
- Highest measured level in the last 10 years: Total Trihalomethanes (TTHMs), 0.094 mg/L, federal limit 0.08 mg/L (1.2 times the limit), 2016.
- Most recent formal enforcement: civil case filed in court by Puerto Rico, October 2018.
- Record on file since 1980, with 102 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 24,472 unknown out of 68,868 service lines.
Check whether Mayaguez serves your address
Health-based violations
Since October 2016Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.
| Contaminant | Rule family | Start date | Status | Acute |
|---|---|---|---|---|
|
Interim Enhanced Surface Water Treatment Rule
Treatment technique failure
|
120 | Sep 1, 2022 | Resolved | Yes |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.081 mg/L, federal limit 0.08 mg/L (at or just above the limit)
|
220 | Oct 1, 2018 | Resolved | No |
|
Long Term 2 Enhanced Surface Water Treatment Rule
Treatment technique failure
|
120 | May 16, 2018 | Resolved | No |
|
Interim Enhanced Surface Water Treatment Rule
Treatment technique failure
|
120 | Jun 1, 2017 | Resolved | Yes |
|
Interim Enhanced Surface Water Treatment Rule
Treatment technique failure
|
120 | Jun 1, 2017 | Resolved | Yes |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.081 mg/L, federal limit 0.08 mg/L (at or just above the limit)
|
220 | Jan 1, 2017 | Resolved | No |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.094 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
|
220 | Oct 1, 2016 | Resolved | No |
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Selenium
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Thallium, Total
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Beryllium, Total
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Antimony, Total
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Mercury
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
CYANIDE
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Chromium (total)
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Cadmium
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Barium
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Arsenic
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Selenium
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Thallium, Total
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Beryllium, Total
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Antimony, Total
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Mercury
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
CYANIDE
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Chromium (total)
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Cadmium
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Barium
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Arsenic
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Selenium
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Thallium, Total
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Beryllium, Total
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Antimony, Total
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Mercury
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
CYANIDE
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Chromium (total)
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Cadmium
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Barium
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
Arsenic
Monitoring and reporting
|
Jan 1, 2022 | Resolved |
|
ETHYLENE DIBROMIDE
Monitoring and reporting
|
Jan 1, 2021 | Resolved |
|
1,2-DIBROMO-3-CHLOROPROPANE
Monitoring and reporting
|
Jan 1, 2021 | Resolved |
|
ETHYLENE DIBROMIDE
Monitoring and reporting
|
Oct 1, 2020 | Resolved |
|
1,2-DIBROMO-3-CHLOROPROPANE
Monitoring and reporting
|
Oct 1, 2020 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2020 | Resolved |
|
Nitrite
Monitoring and reporting
|
Jan 1, 2020 | Resolved |
|
Methoxychlor
Monitoring and reporting
|
Apr 1, 2019 | Resolved |
|
Hexachlorocyclopentadiene
Monitoring and reporting
|
Apr 1, 2019 | Resolved |
|
HEXACHLOROBENZENE
Monitoring and reporting
|
Apr 1, 2019 | Resolved |
|
Heptachlor epoxide
Monitoring and reporting
|
Apr 1, 2019 | Resolved |
|
Heptachlor
Monitoring and reporting
|
Apr 1, 2019 | Resolved |
|
Endrin
Monitoring and reporting
|
Apr 1, 2019 | Resolved |
|
BHC-GAMMA
Monitoring and reporting
|
Apr 1, 2019 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Oct 1, 2018 | Resolved |
|
Chlordane
Monitoring and reporting
|
Jul 31, 2018 | Resolved |
|
ETHYLENE DIBROMIDE
Monitoring and reporting
|
Jul 31, 2018 | Resolved |
|
1,2-DIBROMO-3-CHLOROPROPANE
Monitoring and reporting
|
Jul 31, 2018 | Resolved |
|
Total Polychlorinated Biphenyls (PCB)
Monitoring and reporting
|
Jul 31, 2018 | Resolved |
|
Pentachlorophenol
Monitoring and reporting
|
Jul 31, 2018 | Resolved |
|
Benzo(a)pyrene
Monitoring and reporting
|
Jul 31, 2018 | Resolved |
|
HEXACHLOROBENZENE
Monitoring and reporting
|
Jul 31, 2018 | Resolved |
|
2,4,5-TP
Monitoring and reporting
|
Jul 31, 2018 | Resolved |
|
2,4-D
Monitoring and reporting
|
Jul 31, 2018 | Resolved |
|
Heptachlor epoxide
Monitoring and reporting
|
Jul 31, 2018 | Resolved |
|
Heptachlor
Monitoring and reporting
|
Jul 31, 2018 | Resolved |
|
LASSO
Monitoring and reporting
|
Jul 31, 2018 | Resolved |
|
Atrazine
Monitoring and reporting
|
Jul 31, 2018 | Resolved |
|
Carbofuran
Monitoring and reporting
|
Jul 31, 2018 | Resolved |
|
Hexachlorocyclopentadiene
Monitoring and reporting
|
Jul 31, 2018 | Resolved |
|
Dinoseb
Monitoring and reporting
|
Jul 31, 2018 | Resolved |
|
Picloram
Monitoring and reporting
|
Jul 31, 2018 | Resolved |
|
Di(2-ethylhexyl) phthalate
Monitoring and reporting
|
Jul 31, 2018 | Resolved |
|
Simazine
Monitoring and reporting
|
Jul 31, 2018 | Resolved |
|
OXAMYL
Monitoring and reporting
|
Jul 31, 2018 | Resolved |
|
Di(2-ethylhexyl) adipate
Monitoring and reporting
|
Jul 31, 2018 | Resolved |
|
Glyphosate
Monitoring and reporting
|
Jul 31, 2018 | Resolved |
|
Endothall
Monitoring and reporting
|
Jul 31, 2018 | Resolved |
|
Diquat
Monitoring and reporting
|
Jul 31, 2018 | Resolved |
|
Dalapon
Monitoring and reporting
|
Jul 31, 2018 | Resolved |
|
Toxaphene
Monitoring and reporting
|
Jul 31, 2018 | Resolved |
|
Methoxychlor
Monitoring and reporting
|
Jul 31, 2018 | Resolved |
|
BHC-GAMMA
Monitoring and reporting
|
Jul 31, 2018 | Resolved |
|
Endrin
Monitoring and reporting
|
Jul 31, 2018 | Resolved |
|
Haloacetic Acids (HAA5)
Monitoring and reporting
|
Apr 1, 2018 | Resolved |
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Apr 1, 2018 | Resolved |
|
E. coli
Monitoring and reporting
|
Aug 1, 2017 | Resolved |
|
Cryptosporidium
Monitoring and reporting
|
Aug 1, 2017 | Resolved |
|
Turbidity
Monitoring and reporting
|
Aug 1, 2017 | Resolved |
|
E. coli
Monitoring and reporting
|
Aug 1, 2017 | Resolved |
|
Cryptosporidium
Monitoring and reporting
|
Aug 1, 2017 | Resolved |
|
Turbidity
Monitoring and reporting
|
Aug 1, 2017 | Resolved |
|
E. coli
Monitoring and reporting
|
Jul 1, 2017 | Resolved |
|
Cryptosporidium
Monitoring and reporting
|
Jul 1, 2017 | Resolved |
|
Turbidity
Monitoring and reporting
|
Jul 1, 2017 | Resolved |
|
E. coli
Monitoring and reporting
|
Jul 1, 2017 | Resolved |
|
Cryptosporidium
Monitoring and reporting
|
Jul 1, 2017 | Resolved |
|
Turbidity
Monitoring and reporting
|
Jul 1, 2017 | Resolved |
|
E. coli
Monitoring and reporting
|
Jun 1, 2017 | Resolved |
|
Cryptosporidium
Monitoring and reporting
|
Jun 1, 2017 | Resolved |
|
Turbidity
Monitoring and reporting
|
Jun 1, 2017 | Resolved |
|
E. coli
Monitoring and reporting
|
Jun 1, 2017 | Resolved |
|
Cryptosporidium
Monitoring and reporting
|
Jun 1, 2017 | Resolved |
|
Turbidity
Monitoring and reporting
|
Jun 1, 2017 | Resolved |
|
E. coli
Monitoring and reporting
|
May 1, 2017 | Resolved |
|
Cryptosporidium
Monitoring and reporting
|
May 1, 2017 | Resolved |
|
Turbidity
Monitoring and reporting
|
May 1, 2017 | Resolved |
|
E. coli
Monitoring and reporting
|
May 1, 2017 | Resolved |
|
Cryptosporidium
Monitoring and reporting
|
May 1, 2017 | Resolved |
|
Turbidity
Monitoring and reporting
|
May 1, 2017 | Resolved |
|
E. coli
Monitoring and reporting
|
Apr 1, 2017 | Resolved |
|
Cryptosporidium
Monitoring and reporting
|
Apr 1, 2017 | Resolved |
|
Turbidity
Monitoring and reporting
|
Apr 1, 2017 | Resolved |
|
E. coli
Monitoring and reporting
|
Mar 1, 2017 | Resolved |
|
Cryptosporidium
Monitoring and reporting
|
Mar 1, 2017 | Resolved |
|
Turbidity
Monitoring and reporting
|
Mar 1, 2017 | Resolved |
|
E. coli
Monitoring and reporting
|
Mar 1, 2017 | Resolved |
|
Cryptosporidium
Monitoring and reporting
|
Mar 1, 2017 | Resolved |
|
Turbidity
Monitoring and reporting
|
Mar 1, 2017 | Resolved |
|
E. coli
Monitoring and reporting
|
Feb 1, 2017 | Resolved |
|
Cryptosporidium
Monitoring and reporting
|
Feb 1, 2017 | Resolved |
|
Turbidity
Monitoring and reporting
|
Feb 1, 2017 | Resolved |
|
E. coli
Monitoring and reporting
|
Feb 1, 2017 | Resolved |
|
Cryptosporidium
Monitoring and reporting
|
Feb 1, 2017 | Resolved |
|
Turbidity
Monitoring and reporting
|
Feb 1, 2017 | Resolved |
|
E. coli
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Cryptosporidium
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Turbidity
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
E. coli
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Cryptosporidium
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Turbidity
Monitoring and reporting
|
Jan 1, 2017 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Jan 1, 2016 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Jul 1, 2012 | Resolved |
Full record since 1980
EPA's records for Mayaguez go back to 1980. Before October 19, 2016 they list 102 health-based violations (42 resolved, 60 archived by EPA without a recorded fix) and 562 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1980s | 0 | 18 |
| 1990s | 48 | 8 |
| 2000s | 16 | 398 |
| 2010 to October 18, 2016 | 38 | 138 |
| October 19, 2016 to 2019 | 5 | 84 |
| 2020s | 1 | 36 |
Most recent health-based violation before October 19, 2016: Total Trihalomethanes (TTHMs), began October 2016, Resolved.
Show all 102 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.094 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
|
Oct 1, 2016 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.106 mg/L, federal limit 0.08 mg/L (1.3 times the limit)
|
Jul 1, 2016 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.068 mg/L, federal limit 0.06 mg/L (1.1 times the limit)
|
Jul 1, 2016 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.066 mg/L, federal limit 0.06 mg/L (1.1 times the limit)
|
Apr 1, 2016 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.097 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
|
Apr 1, 2016 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.103 mg/L, federal limit 0.08 mg/L (1.3 times the limit)
|
Jan 1, 2016 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.07 mg/L, federal limit 0.06 mg/L (1.2 times the limit)
|
Jan 1, 2016 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.093 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
|
Oct 1, 2015 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.083 mg/L, federal limit 0.08 mg/L (at or just above the limit)
|
Jul 1, 2015 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.087 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
|
Apr 1, 2015 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.092 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
|
Jan 1, 2015 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.072 mg/L, federal limit 0.06 mg/L (1.2 times the limit)
|
Jan 1, 2015 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.085 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
|
Oct 1, 2014 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.07 mg/L, federal limit 0.06 mg/L (1.2 times the limit)
|
Oct 1, 2014 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.073 mg/L, federal limit 0.06 mg/L (1.2 times the limit)
|
Jul 1, 2014 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.086 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
|
Jul 1, 2014 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.077 mg/L, federal limit 0.06 mg/L (1.3 times the limit)
|
Apr 1, 2014 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.076 mg/L, federal limit 0.06 mg/L (1.3 times the limit)
|
Jan 1, 2014 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.076 mg/L, federal limit 0.06 mg/L (1.3 times the limit)
|
Oct 1, 2013 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.076 mg/L, federal limit 0.06 mg/L (1.3 times the limit)
|
Jul 1, 2013 | Archived |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.072 mg/L, federal limit 0.06 mg/L (1.2 times the limit)
|
Apr 1, 2013 | Archived |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.061 mg/L, federal limit 0.06 mg/L (at or just above the limit)
|
Jan 1, 2013 | Archived |
|
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
|
Oct 1, 2011 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
|
Jul 1, 2011 | Resolved |
|
Total Coliform (acute)
Contaminant limit exceeded
|
Jun 1, 2011 | Resolved |
|
CARBON, TOTAL
Treatment technique failure
|
Apr 1, 2011 | Resolved |
|
CARBON, TOTAL
Treatment technique failure
|
Jan 1, 2011 | Resolved |
|
CARBON, TOTAL
Treatment technique failure
|
Oct 1, 2010 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
|
Oct 1, 2010 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
|
Oct 1, 2010 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
|
Sep 1, 2010 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
|
Aug 1, 2010 | Resolved |
|
CARBON, TOTAL
Treatment technique failure
|
Jul 1, 2010 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
|
Jul 1, 2010 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
|
Jun 1, 2010 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
|
May 1, 2010 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
|
May 1, 2010 | Resolved |
|
CARBON, TOTAL
Treatment technique failure
|
Apr 1, 2010 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
|
Dec 1, 2009 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
|
Nov 1, 2009 | Resolved |
|
Total Coliform (acute)
Contaminant limit exceeded
|
Oct 1, 2009 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
|
Oct 1, 2009 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
|
Sep 1, 2009 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
|
Aug 1, 2009 | Resolved |
|
CARBON, TOTAL
Treatment technique failure
|
Oct 1, 2005 | Archived |
|
CARBON, TOTAL
Treatment technique failure
|
Oct 1, 2005 | Resolved |
|
CARBON, TOTAL
Treatment technique failure
|
Jul 1, 2005 | Archived |
|
CARBON, TOTAL
Treatment technique failure
|
Apr 1, 2005 | Archived |
|
CARBON, TOTAL
Treatment technique failure
|
Jan 1, 2005 | Archived |
|
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
|
Oct 1, 2004 | Archived |
52 older violations are not listed here. EPA ECHO has the complete list.
Enforcement actions
Puerto Rico regulators took 10 formal enforcement actions against Mayaguez between 1998 and 2018, filed as 14 records in EPA's data. The most recent was a civil case filed in court in October 2018.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Oct 30, 2018 | Puerto Rico | Civil case filed in court | 1 violation (1 health-based): Total Trihalomethanes (TTHMs) |
| Sep 19, 2016 | Puerto Rico | Civil case filed in court | 1 violation (1 health-based): Total Trihalomethanes (TTHMs) |
| Apr 14, 2016 | Puerto Rico | Civil case filed in court | 2 violations (2 health-based): Haloacetic Acids (HAA5) |
| Aug 3, 2015 | Puerto Rico | Civil case filed in court | 1 violation (1 health-based): Total Trihalomethanes (TTHMs) |
| Nov 5, 2014 | Puerto Rico | Civil case filed in court | 8 violations (8 health-based): Total Trihalomethanes (TTHMs) |
| Jul 17, 2013 | Puerto Rico | Compliance order (no penalty) | 21 violations: 1,2,4-Trichlorobenzene, Xylenes, Total, DICHLOROMETHANE, p-Dichlorobenzene, Vinyl chloride |
| Apr 30, 2013 | Puerto Rico | Civil case filed in court | 17 violations (17 health-based): Total Trihalomethanes (TTHMs), Haloacetic Acids (HAA5) |
| Jun 2, 2010 | Puerto Rico | Civil case filed in court | 5 violations (5 health-based): Interim Enhanced Surface Water Treatment Rule |
| Jun 24, 2008 | Puerto Rico | Civil case filed in court | 12 violations (12 health-based): CARBON, TOTAL, Interim Enhanced Surface Water Treatment Rule |
| Jun 30, 1998 | Puerto Rico | Compliance order with a penalty | 51 violations (46 health-based): Surface Water Treatment Rule |
What the violations mean
Interim Enhanced Surface Water Treatment Rule
3 incidentsThe system did not meet a filtration or treatment requirement for surface water
Inadequate treatment of surface water can let pathogens such as Cryptosporidium and Giardia through
Total Trihalomethanes (TTHMs)
3 incidentsDisinfection byproduct levels exceeded the federal limit
Long-term TTHM exposure may increase bladder cancer risk
Long Term 2 Enhanced Surface Water Treatment Rule
1 incidentThe system failed required surface water treatment or filtration standards
Untreated or inadequately treated surface water can contain bacteria and viruses
Where the water comes from
Mayaguez draws water from 14 wells and 2 surface water intakes (2 of them for emergency, seasonal or other part-time use).
Annual water quality report
Mayaguez must give its customers an annual water quality report (Consumer Confidence Report) by July 1, with the levels its tests found in the previous year.
Systems serving 10,000 or more people must mail or deliver the report to every customer, and from 2027 they must send it twice a year.
Find a posted report with EPA's Consumer Confidence Report search
Testing your own water
To test the water at your tap, or a private well this record does not cover, use a laboratory certified for drinking water by Puerto Rico.
Certified drinking water labs by state EPA guidance for private wells