Velarion Records

Clean Water Act discharge permit · NPDES CA0003352

SIX FLAGS MAGIC MOUNTAIN, Valencia, CA: NPDES CA0003352 discharge permit, effluent exceedances, inspections, penalties

SIX FLAGS MAGIC MOUNTAIN, held by SIX FLAGS THEME PARKS, INC., holds NPDES permit CA0003352, which discharges to Santa Clara River. EPA’s file records it issued June 2, 2005 and expiring May 10, 2010. 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 filedSIX FLAGS MAGIC MOUNTAIN
Permittee as filedSIX FLAGS THEME PARKS, INC.
NPDES IDCA0003352
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
IssuedJune 2, 2005
Expiration dateMay 10, 2010
AddressValencia, CA 91355
Receiving waterSANTA CLARA RIVER
Receiving water impaired303(D) Listed
SubwatershedSalt Canyon-Santa Clara River (HUC 180701020403)
SIC7996 – Amusement Parks
Other EPA IDs (FRS)RCRA handler CAD981657976; ICIS-AIR source CASCA00006037C3202

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; the 60 with the most exceedances of 150 are shown.

Pollutant or measureLimitsViolations, any kindEffluent exceedancesLatest exceedanceLargest exceedance, as filed
Copper, total recoverable07371December 31, 202526,900% over the limit
E. coli06763June 30, 202699,999% over the limit
Coliform, fecal general06763June 30, 202699,999% over the limit
Solids, total suspended05347March 31, 202621,561% over the limit
BOD, 5-day, 20 deg. C04537March 31, 20268,054% over the limit
Solids, settleable04135March 31, 20261,200% over the limit
Oil and grease04222December 31, 202513,000% over the limit
Chlorine, total residual02322December 31, 20251,965% over the limit
Phenols01911March 31, 20261,536% over the limit
Chloride [as Cl]01511May 31, 20255,867% over the limit
Lead, total recoverable04610September 30, 202546,733% over the limit
Turbidity01010March 31, 2026
Nitrogen, ammonia total [as N]0197March 31, 2024671% over the limit
Solids, total dissolved065March 31, 20261,605% over the limit
Sulfate, total [as SO4]074December 31, 2025344% over the limit
Di[2-ethylhexyl] phthalate [DEHP]064November 30, 20251,800% over the limit
pH063February 28, 2017
Temperature, water deg. fahrenheit033January 31, 20251% over the limit
Nitrite + Nitrate total [as N]032September 30, 2023116% over the limit
Boron, total recoverable032December 31, 202362% over the limit
4,4'-DDT0180
Mercury, total recoverable0150
% Survival Static Renewal 96Hr Acute Pimephales promelas060
TU Static 4 Day Chronic Raphidocelis subcapitata (formerly Selenastrum capricornutum)060
TU Static Renewal 7-Day Chronic Ceriodaphnia dubia060
TU Static Renewal 7-Day Chronic Pimphales promelas060
Cyanide, total [as CN]030
Sulfide, total [as S]030
Asbestos030
Thallium, total recoverable030
Beryllium, total recoverable [as Be]030
Nickel, total recoverable030
Antimony, total recoverable030
2-Methyl-4,6-dinitrophenol030
Dichlorobromomethane030
Carbon tetrachloride030
1,2-Dichloroethane030
Bromoform030
Dibromochloromethane030
Chloroform030
Toluene030
Benzene030
.delta.-BHC030
Acenaphthylene030
Acenaphthene030
Acrolein030
Acrylonitrile030
Anthracene030
Benzo[b]fluoranthene030
Benzo[k]fluoranthene030
Benzo[a]pyrene030
Bis[2-chloroethyl] ether030
Bis[2-chloroethoxy]methane030
Bis[2-chloroisopropyl] ether030
Butyl benzyl phthalate030
Chlorobenzene030
Chrysene030
Diethyl phthalate030
Dimethyl phthalate030
1,2-Diphenylhydrazine030

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

EPA’s single-event violation file, as loaded, holds no violation for NPDES CA0003352.

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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EPA publishes a free Detailed Facility Report for every permit on ECHO: its compliance status quarter by quarter, its inspections, and its enforcement actions and penalties. EPA also sends free notices of new inspections and enforcement actions through ECHO Notify; enter NPDES ID CA0003352 there.

Nearby on the register

Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.

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