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Clean Water Act discharge permit · NPDES FL0000761

MOSAIC FERTILIZER, LLC - RIVERVIEW CHEMICAL PLANT, Riverview, FL: NPDES FL0000761 discharge permit, effluent exceedances, inspections, penalties

MOSAIC FERTILIZER, LLC - RIVERVIEW CHEMICAL PLANT, held by Mosaic Fertilizer LLC, holds NPDES permit FL0000761, which discharges to Alafia R, Hillsborough Bay. EPA’s file records it issued August 3, 2018 and expiring August 21, 2023. The status and dates are as EPA’s permit file stood when Velarion loaded it (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.

Identity

Facility as filedMOSAIC FERTILIZER, LLC - RIVERVIEW CHEMICAL PLANT
Permittee as filedMosaic Fertilizer LLC
NPDES IDFL0000761
Permit statusAdministratively continued (past its expiration date and still in force until reissued)
Permit typeIndividual permit
Discharger classMajor discharger
Facility typeNot a publicly owned treatment works
IssuedAugust 3, 2018
Expiration dateAugust 21, 2023
Issuing agencyFlorida Department of Environmental Protection
AddressRiverview, FL 33569
Receiving waterAlafia R, Hillsborough Bay
Receiving water impaired303(D) Listed
SubwatershedAlafia River (HUC 031002040306)
NAICS325312 – Phosphatic Fertilizer Manufacturing
SIC2874 – Phosphatic Fertilizers
Other EPA IDs (FRS)RCRA handler FLD064696107; ICIS-AIR source FL0000001205700008

Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download; cross-program IDs from EPA’s FRS facility-registry crosswalk.

Effluent limits and exceedances

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 measureLimitsViolations, any kindEffluent exceedancesLatest exceedanceLargest exceedance, as filed
IC25 Static Renewal 7 Day Chronic Americamysis bahia (formerly Mysidopsis bahia)121212December 31, 202599,999% over the limit
Alpha, gross particle activity565September 30, 2022137% over the limit
Nitrogen, ammonia total [as N]23124July 31, 201883% over the limit
Iron, total recoverable484November 30, 20251,576% over the limit
Phosphorus, total [as P]44113July 31, 2008514% over the limit
Fluoride, total [as F]2173September 30, 2025184% over the limit
Zinc, total recoverable353September 30, 2017106% over the limit
Oil & Grease332February 28, 201190% over the limit
LC50 Static Renewal 96Hr Acute Ceriodaphnia dubia922December 31, 202591% over the limit
IC25 Static Renewal 7 Day Chronic Ceriodaphnia dubia922June 30, 201599,999% over the limit
LC50 Static Renewal 96Hr Acute Americamysis bahia (formerly Mysidopsis bahia)9271June 30, 200899,999% over the limit
Nitrogen, total [as N]4991July 31, 200635% over the limit
Copper, total recoverable441September 30, 2017181% over the limit
Radium 226 + radium 228, total531December 31, 201216% over the limit
Nickel, total recoverable331September 30, 2017122% over the limit
Chlorine, total residual311May 31, 20181,000% over the limit
LC50 Static Renewal 96Hr Acute Menidia9260
Flow, in conduit or thru treatment plant17160
pH3380
Temperature, water deg. centigrade670
Solids, total suspended1440
Sulfate, total [as SO4]1420
Specific conductance820
Oxygen, dissolved [DO]020
Aluminum, total recoverable310
IC25 Static Renewal 7 Day Chronic Menidia menidia1200
LC50 Static Renewal 96Hr Acute Cyprinella leedsi900
IC25 Static Renewal 7 Day Chronic Chrpimephales900
Chlorophyll A800
Ammonia, unionized600
Turbidity500
Salinity500
Phosphate, ortho [as PO4]500
Chloride [as Cl]500
Oxygen, dissolved percent saturation300

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

DateWhat EPA recordedAgency
November 16, 2022WW SSO - Overflow to Dry Land or Building BackupST6

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 October 14, 2026.

What this page shows

This public-records page covers NPDES permit FL0000761 held by Mosaic Fertilizer LLC for the MOSAIC FERTILIZER, LLC - RIVERVIEW CHEMICAL PLANT, which discharges to the Alafia R in Hillsborough Bay under an administratively continued major discharger status. The page lists 34 as the discharger class, 16 pollutants under a numeric limit, and 16 pollutants with an effluent exceedance, with the permit's issue and expiration dates as filed in EPA's file.