Public water system record
N.S. Mayport
Serves Jacksonville, Duval County, FL · 20,500 people served
Federal records show no health-based violations and 3 monitoring/reporting issues for N.S. Mayport in the last ten years.
System profile
- Health-based violations, last 10 years
- 0
- Resolved
- 0
- Unresolved
- 0
- Any acute record
- No
- Monitoring issues, last 10 years
- 3
Key facts
- N.S. Mayport draws water from 4 wells.
- Record on file since 1992, with 6 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 906 unknown out of 917 service lines.
Check whether N.S. Mayport 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.
None since October 2016.
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
E. coli
Monitoring and reporting
|
Aug 1, 2025 | Resolved |
|
Revised Total Coliform Rule
RPT
|
Nov 1, 2021 | Resolved |
|
E. coli
Monitoring and reporting
|
Dec 1, 2017 | Resolved |
Full record since 1992
EPA's records for N.S. Mayport go back to 1992. Before October 19, 2016 they list 6 health-based violations (2 resolved, 4 archived by EPA without a recorded fix) and no monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1990s | 2 | 0 |
| 2000s | 2 | 0 |
| 2010 to October 18, 2016 | 2 | 0 |
| October 19, 2016 to 2019 | 0 | 1 |
| 2020s | 0 | 2 |
Most recent health-based violation before October 19, 2016: Total Coliform, began October 2015, Resolved.
Show all 6 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Coliform
Contaminant limit exceeded
|
Oct 1, 2015 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 82.03 µg/L, federal limit 80 µg/L (at or just above the limit)
|
Jul 1, 2013 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Jul 1, 2008 | Archived |
|
Total Coliform
Contaminant limit exceeded
|
Apr 1, 2008 | Archived |
|
Total Coliform
Contaminant limit exceeded
|
Oct 1, 1994 | Archived |
|
Gross Alpha, Excl. Radon and U
Contaminant limit exceeded
|
Apr 1, 1992 | Archived |
Where the water comes from
N.S. Mayport draws water from 4 wells.
Annual water quality report
N.S. Mayport 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 Florida.
Certified drinking water labs by state EPA guidance for private wells