Clean Water Act discharge permit · NPDES FL0000922
AWMS LLC MAYPORT NAVAL STATION WWTF, Mayport, FL: NPDES FL0000922 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 37Pollutants under a numeric limit
- 16Pollutants with an effluent exceedance
AWMS LLC MAYPORT NAVAL STATION WWTF, held by American Water Military Services, LLC, holds NPDES permit FL0000922, which discharges to St Johns R Class Iii Marine Wbid 2213a. EPA’s file records it issued December 6, 2019 and expiring December 5, 2024. The status and dates are as EPA’s permit file stood when Velarion loaded it (September 15, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | AWMS LLC MAYPORT NAVAL STATION WWTF |
|---|---|
| Permittee as filed | American Water Military Services, LLC |
| NPDES ID | FL0000922 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Federal facility |
| Issued | December 6, 2019 |
| Expiration date | December 5, 2024 |
| Issuing agency | Florida Department of Environmental Protection |
| Address | Mayport, FL 32228 |
| Receiving water | St Johns R Class III Marine WBID 2213A |
| Receiving water impaired | 303(D) Listed |
| Subwatershed | New Rose Creek (HUC 030801031404) |
Cited to the EPA ICIS-NPDES permit file (ECHO download).
Effluent limits and exceedances
- 40Pollutants on file
- 37Under a numeric limit
- 33With a violation of any kind
- 16With an effluent exceedance
An effluent exceedance is a discharge monitoring report value over the permit’s numeric limit (EPA’s violation code E90). A violation of any kind also counts a report not filed. Each row is EPA’s own count for that pollutant.
| Pollutant or measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| Surfactants [MBAS] | 1 | 23 | 21 | December 31, 2023 | 160% over the limit |
| Enterococci: group D, MF trans, M-E, EIA | 2 | 20 | 20 | January 31, 2026 | 689% over the limit |
| Chlorodibromomethane | 2 | 18 | 18 | September 30, 2014 | 123% over the limit |
| Nickel, total recoverable | 4 | 16 | 16 | July 31, 2026 | 286% over the limit |
| Oil & Grease | 1 | 12 | 11 | September 30, 2025 | 300% over the limit |
| Copper, total recoverable | 4 | 11 | 10 | April 30, 2017 | 2,011% over the limit |
| IC25 Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia) | 3 | 11 | 5 | February 28, 2021 | 51% over the limit |
| Chlorine, total residual | 2 | 7 | 5 | February 28, 2015 | 49,900% over the limit |
| Peracetic Acid | 2 | 5 | 5 | May 31, 2018 | 100% over the limit |
| Solids, total suspended | 9 | 13 | 3 | August 31, 2004 | 71% over the limit |
| IC25 Static Renewal 7 Day Chronic Menidia menidia | 3 | 9 | 3 | March 31, 2022 | 96% over the limit |
| Coliform, fecal general | 3 | 11 | 2 | February 28, 2017 | 2,400% over the limit |
| pH | 5 | 4 | 2 | May 31, 2018 | |
| Length of longest pH excursion | 1 | 2 | 1 | May 31, 2018 | 197% over the limit |
| BOD, carb-5 day, 20 deg C, percent removal | 1 | 1 | 1 | November 30, 2020 | 47% over the limit |
| Solids, suspended percent removal | 1 | 1 | 1 | November 30, 2012 | 7% over the limit |
| BOD, carbonaceous [5 day, 20 C] | 9 | 9 | 0 | ||
| LC50 Static Renewal 96Hr Acute Americamysis bahia (formerly Mysidopsis bahia) | 0 | 4 | 0 | ||
| LC50 Static Renewal 96Hr Acute Menidia | 0 | 4 | 0 | ||
| Flow, in conduit or thru treatment plant | 3 | 3 | 0 | ||
| Temperature, water deg. centigrade | 4 | 2 | 0 | ||
| Petrol hydrocarbons, total recoverable | 2 | 2 | 0 | ||
| Phosphorus, total [as P] | 8 | 1 | 0 | ||
| Oxygen, dissolved [DO] | 4 | 1 | 0 | ||
| Nitrogen, Kjeldahl, total [as N] | 4 | 1 | 0 | ||
| Nitrite + Nitrate total [as N] | 4 | 1 | 0 | ||
| Plant capacity fact. percent of capacity | 1 | 1 | 0 | ||
| Nitrogen, organic total [as N] | 1 | 1 | 0 | ||
| Nitrogen, ammonia total [as N] | 1 | 1 | 0 | ||
| Phosphorous, in total orthophosphate | 1 | 1 | 0 | ||
| Mercury, total recoverable | 1 | 1 | 0 | ||
| % of time exceeding pH limits | 1 | 1 | 0 | ||
| Ammonia, unionized | 0 | 1 | 0 | ||
| Nitrogen, total [as N] | 8 | 0 | 0 | ||
| Salinity | 4 | 0 | 0 | ||
| Specific conductance | 3 | 0 | 0 | ||
| Oxygen, dissolved percent saturation | 3 | 0 | 0 | ||
| Chlorophyll A | 3 | 0 | 0 | ||
| Iron, total recoverable | 1 | 0 | 0 | ||
| Lead, total recoverable | 1 | 0 | 0 |
Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.
Inspections, violations and enforcement
- 13Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| October 22, 2025 | WW SSO - Overflow to Dry Land or Building Backup | ST6 |
| August 15, 2025 | WW SSO - Discharge to Waters | ST6 |
| August 11, 2025 | WW SSO - Overflow to Dry Land or Building Backup | ST6 |
| May 19, 2025 | WW SSO - Overflow to Dry Land or Building Backup | ST6 |
| March 17, 2025 | WW SSO - Discharge to Waters | ST6 |
| November 18, 2024 | WW SSO - Overflow to Dry Land or Building Backup | ST6 |
| June 24, 2024 | WW SSO - Overflow to Dry Land or Building Backup | ST6 |
| July 25, 2023 | WW SSO - Overflow to Dry Land or Building Backup | ST6 |
| October 12, 2022 | WW SSO - Overflow to Dry Land or Building Backup | ST6 |
| July 25, 2022 | Effluent Violations - Narrative Effluent Violation | ST6 |
| November 5, 2020 | WW SSO - Overflow to Dry Land or Building Backup | ST6 |
| September 21, 2020 | WW SSO - Overflow to Dry Land or Building Backup | ST6 |
| June 2, 2020 | WW SSO - Overflow to Dry Land or Building Backup | ST6 |
Velarion’s copy of EPA’s ICIS-NPDES files does not include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.
Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.
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Nearby on the register
Figures from EPA’s ICIS-NPDES download, loaded September 15, 2026.