Public water system record
San Sebastian
On record as serving San Sebastián, San Sebastián Municipio, PR · Serves 24,449 people
Federal records show 4 health-based violations and 25 monitoring/reporting issues for San Sebastian in the last ten years. The most serious issue in this window was a resolved Haloacetic Acids (HAA5) violation.
System profile
Source water
Surface water
ZIP
00685
EPA system ID
PR0003303
- Health-based violations, last 10 years
- 4
- Resolved
- 4
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 25
Key facts
- San Sebastian draws water from 2 surface water intakes.
- Highest measured level in the last 10 years: Haloacetic Acids (HAA5), 0.088 mg/L, federal limit 0.06 mg/L (1.5 times the limit), 2018.
- Most recent formal enforcement: civil case filed in court by Puerto Rico, August 2018.
- Record on file since 1980, with 73 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 3,585 unknown out of 10,773 service lines.
Check whether San Sebastian 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 |
|---|---|---|---|---|
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.062 mg/L, federal limit 0.06 mg/L (at or just above the limit)
|
220 | Apr 1, 2020 | Resolved | No |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.079 mg/L, federal limit 0.06 mg/L (1.3 times the limit)
|
220 | Oct 1, 2018 | Resolved | No |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.088 mg/L, federal limit 0.06 mg/L (1.5 times the limit)
|
220 | Apr 1, 2018 | Resolved | No |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.066 mg/L, federal limit 0.06 mg/L (1.1 times the limit)
|
220 | Jan 1, 2018 | Resolved | No |
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2020 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Oct 1, 2018 | Resolved |
|
E. coli
Monitoring and reporting
|
Apr 1, 2018 | Resolved |
|
Cryptosporidium
Monitoring and reporting
|
Apr 1, 2018 | Resolved |
|
Turbidity
Monitoring and reporting
|
Apr 1, 2018 | Resolved |
|
E. coli
Monitoring and reporting
|
Jan 1, 2018 | Resolved |
|
Cryptosporidium
Monitoring and reporting
|
Jan 1, 2018 | Resolved |
|
Turbidity
Monitoring and reporting
|
Jan 1, 2018 | 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
|
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
|
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 |
|
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 San Sebastian go back to 1980. Before October 19, 2016 they list 73 health-based violations (28 resolved, 45 archived by EPA without a recorded fix) and 49 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1980s | 0 | 18 |
| 1990s | 25 | 5 |
| 2000s | 25 | 20 |
| 2010 to October 18, 2016 | 23 | 6 |
| October 19, 2016 to 2019 | 3 | 22 |
| 2020s | 1 | 1 |
Most recent health-based violation before October 19, 2016: Total Coliform (acute), began February 2016, Resolved.
Show all 73 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Coliform (acute)
Contaminant limit exceeded
|
Feb 1, 2016 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.082 mg/L, federal limit 0.08 mg/L (at or just above the limit)
|
Jan 1, 2016 | 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, 2016 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.072 mg/L, federal limit 0.06 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 |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.068 mg/L, federal limit 0.06 mg/L (1.1 times the limit)
|
Jul 1, 2015 | Resolved |
|
CARBON, TOTAL
Treatment technique failure
|
Apr 1, 2015 | 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, 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 0.081 mg/L, federal limit 0.08 mg/L (at or just above the limit)
|
Jan 1, 2015 | Resolved |
|
CARBON, TOTAL
Treatment technique failure
|
Jan 1, 2015 | Resolved |
|
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, 2015 | Resolved |
|
CARBON, TOTAL
Treatment technique failure
|
Oct 1, 2014 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.083 mg/L, federal limit 0.08 mg/L (at or just above the limit)
|
Oct 1, 2014 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.061 mg/L, federal limit 0.06 mg/L (at or just above the limit)
|
Oct 1, 2014 | Resolved |
|
CARBON, TOTAL
Treatment technique failure
|
Jul 1, 2014 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.075 mg/L, federal limit 0.06 mg/L (1.3 times the limit)
|
Jul 1, 2014 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.085 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
|
Jul 1, 2014 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
|
May 1, 2011 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.065 mg/L, federal limit 0.06 mg/L (1.1 times the limit)
|
Jul 1, 2010 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
|
Jun 1, 2010 | Archived |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.067 mg/L, federal limit 0.06 mg/L (1.1 times the limit)
|
Apr 1, 2010 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.069 mg/L, federal limit 0.06 mg/L (1.2 times the limit)
|
Jan 1, 2010 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.086 mg/L, federal limit 0.06 mg/L (1.4 times the limit)
|
Oct 1, 2009 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.072 mg/L, federal limit 0.06 mg/L (1.2 times the limit)
|
Jul 1, 2009 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.067 mg/L, federal limit 0.06 mg/L (1.1 times the limit)
|
Jan 1, 2009 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
|
Sep 1, 2006 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
|
Jul 1, 2006 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
|
May 1, 2006 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
|
Sep 1, 2005 | Archived |
|
Total Coliform
Contaminant limit exceeded
|
Nov 1, 2004 | Archived |
|
CARBON, TOTAL
Treatment technique failure
|
Jul 1, 2004 | Archived |
|
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
|
Jul 1, 2004 | Archived |
|
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
|
Jun 1, 2002 | Archived |
|
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
|
May 1, 2002 | Archived |
|
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
|
Apr 1, 2002 | Archived |
|
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
|
Mar 1, 2002 | Archived |
|
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
|
Feb 1, 2002 | Archived |
|
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
|
Jan 1, 2002 | Archived |
|
Surface Water Treatment Rule
Treatment technique failure
|
Nov 1, 2001 | Archived |
|
Surface Water Treatment Rule
Treatment technique failure
|
Oct 1, 2001 | Archived |
|
Surface Water Treatment Rule
Treatment technique failure
|
Sep 1, 2001 | Archived |
|
Surface Water Treatment Rule
Treatment technique failure
|
Sep 1, 2000 | Archived |
|
Surface Water Treatment Rule
Treatment technique failure
|
Aug 1, 2000 | Archived |
|
Surface Water Treatment Rule
Treatment technique failure
|
Jul 1, 2000 | Archived |
|
Surface Water Treatment Rule
Treatment technique failure
|
Mar 1, 2000 | Archived |
|
Surface Water Treatment Rule
Treatment technique failure
|
Feb 1, 2000 | Archived |
|
Surface Water Treatment Rule
Treatment technique failure
|
Jan 1, 2000 | Archived |
|
Surface Water Treatment Rule
Treatment technique failure
|
Dec 1, 1999 | Archived |
|
Surface Water Treatment Rule
Treatment technique failure
|
Nov 1, 1999 | Archived |
23 older violations are not listed here. EPA ECHO has the complete list.
Enforcement actions
Puerto Rico regulators took 8 formal enforcement actions against San Sebastian between 1994 and 2018, filed as 10 records in EPA's data. The most recent was a civil case filed in court in August 2018.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Aug 7, 2018 | Puerto Rico | Civil case filed in court | 1 violation (1 health-based): Haloacetic Acids (HAA5) |
| May 8, 2018 | Puerto Rico | Civil case filed in court | 2 violations (2 health-based): Haloacetic Acids (HAA5) |
| Oct 27, 2014 | Puerto Rico | Civil case filed in court | 13 violations (13 health-based): Haloacetic Acids (HAA5), Total Trihalomethanes (TTHMs) |
| Feb 4, 2010 | Puerto Rico | Civil case filed in court | 3 violations (3 health-based): Haloacetic Acids (HAA5) |
| Dec 31, 2009 | Puerto Rico | Civil case filed in court | 2 violations (2 health-based): Haloacetic Acids (HAA5) |
| Jun 24, 2008 | Puerto Rico | Civil case filed in court | 1 violation (1 health-based): Interim Enhanced Surface Water Treatment Rule |
| Apr 25, 2002 | Puerto Rico | Compliance order with a penalty | 3 violations (3 health-based): Surface Water Treatment Rule |
| Apr 15, 1994 | Puerto Rico | Compliance order (no penalty) | 9 violations (9 health-based): Surface Water Treatment Rule |
What the violations mean
Haloacetic Acids (HAA5)
4 incidentsHaloacetic acid byproducts exceeded the federal limit
Long-term exposure to HAAs may increase cancer risk
Where the water comes from
San Sebastian draws water from 2 surface water intakes.
Annual water quality report
San Sebastian 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