2014 Louisiana Water Quality Integrated ReportAppendix C

APPENDIX C:

Complete list of suspected causes of impairment and cause descriptions used in U.S. EPA’s Assessment Database

Suspected Causes / Description of Suspected Causes of Impairment
alpha-BHC / alpha-BHC. CAS Registry Number: 319-84-6. Code a Clean Water Act Priority Pollutant. Code used in CWA permitting for Great Lakes Bioaccumulative Chemicals of Concern.
alpha-Endosulfan(Endosulfan 1) / alpha-Endosulfan (Endosulfan 1). CAS Registry Number: 959-98-8. Code a Clean Water Act Priority Pollutant.
beta-BHC / beta-BHC. CAS Registry Number: 319-85-7. Code a Clean Water Act Priority Pollutant. Code used in CWA permitting for Great Lakes Bioaccumulative Chemicals of Concern.
beta-Endosulfan (Endosulfan 2) / beta-Endosulfan (Endosulfan 2). CAS Registry Number: 33213-65-9. Code a Clean Water Act Priority Pollutant.
delta-BHC / delta-BHC. CAS Registry Number: 319-86-8. Code a Clean Water Act Priority Pollutant. Code used in CWA permitting for Great Lakes Bioaccumulative Chemicals of Concern.
1,1,1,2-Tetrachloroethane / 1,1,1,2-Tetrachloroethane. CAS Registry Number: 630-20-6. Code related to a toxic chemical in the Toxics Release Inventory.
1,1,1-Trichloroethane / 1,1,1-Trichloroethane. CAS Registry Number: 71-55-6. Code a Clean Water Act Priority Pollutant. Code a Safe Drinking Water Act Standard.
1,1,2,2-Tetrachloroethane / 1,1,2,2-Tetrachloroethane. CAS Registry Number: 79-34-5. Code a Clean Water Act Priority Pollutant.
1,1,2-Trichloroethane / 1,1,2-Trichloroethane. CAS Registry Number: 79-00-5. Code a Clean Water Act Priority Pollutant. Code a Safe Drinking Water Act Standard.
1,1-Dichloro-1,2,2-trifluoroethane / 1,1-Dichloro-1,2,2-trifluoroethane. CAS Registry Number: 306-83-2. Code related to a toxic chemical in the Toxics Release Inventory.
1,1-Dichloroethane / 1,1-Dichloroethane. CAS Registry Number: 75-34-3. Code a Clean Water Act Priority Pollutant. Code a Safe Drinking Water Act Standard.
1,2,3,4-Tetrachlorobenzene / 1,2,3,4-Tetrachlorobenzene. CAS Registry Number: 634-66-2. Code used in CWA permitting for Great Lakes Bioaccumulative Chemicals of Concern.
1,2,4,5-Tetrachlorobenzene / 1,2,4,5-Tetrachlorobezene. CAS Registry Number: 95-95-3. Code a Clean Water Act Non-Priority Pollutant.
1,2,4-Trichlorobenzene / 1,2,4-Trichlorobenzene. CAS Registry Number: 120-82-1. Code a Clean Water Act Priority Pollutant. Code a Safe Drinking Water Act Standard.
1,2,4-Trimethylbenzene / 1,2,4-Trimethylbenzene. CAS Registry Number: 95-63-6. Code related to a toxic chemical in the Toxics Release Inventory.
1,2-Butylene oxide / 1,2-Butylene oxide. CAS Registry Number: 106-88-7. Code related to a toxic chemical in the Toxics Release Inventory.
1,2-Dibromo-3-chloropropane / 1,2-Dibromo-3-chloropropane. CAS Registry Number: 96-12-8. Code related to a toxic chemical in the Toxics Release Inventory.
1,2-Dibromo-3-chloropropane (DBCP) / 1,2-Dibromo-3-chloropropane (DBCP). CAS Registry Number: 10222-01-2. Code a Safe Drinking Water Act Standard.
1,2-Dichloroethane / 1,2-Dichloroethane. CAS Registry Number: 107-06-2. Code a Clean Water Act Priority Pollutant. Code a Safe Drinking Water Act Standard.
1,2-Dichloroethylene / 1,2-Dichloroethylene. CAS Registry Number: 540-59-0. Code related to a toxic chemical in the Toxics Release Inventory.
1,2-Dichloropropane / 1,2-Dichloropropane. CAS Registry Number: 78-87-5. Code a Clean Water Act Priority Pollutant. Code a Safe Drinking Water Act Standard.
1,2-Diphenylhydrazine / 1,2-Diphenylhydrazine. CAS Registry Number: 122-66-7. Code a Clean Water Act Priority Pollutant. Code pertains to Safe Drinking Water Act Unregulated Contaminants Monitoring Rule.
1,3-Butadiene / 1,3-Butadiene. CAS Registry Number: 106-99-0. Code related to a toxic chemical in the Toxics Release Inventory.
1,3-Dichloropropene / 1,3-Dichloropropene. CAS Registry Number: 542-75-6. Code a Clean Water Act Priority Pollutant.
1,4-Dioxane / 1,4-Dioxane. CAS Registry Number: 123-91-1. Code related to a toxic chemical in the Toxics Release Inventory.
2,2'-Dichlorodiethyl ether / 2,2'-Dichlorodiethyl ether. CAS Registry Number: 111-44-4. Code a Clean Water Act Priority Pollutant.
2,2'-Dichlorodiisopropyl ether / 2,2'-Dichlorodiisopropyl ether. CAS Registry Number: 39638-32-9. Code a Clean Water Act Priority Pollutant.
2,3,7,8-Tetrachlorodibenzofuran / 2,3,7,8-Tetrachlorodibenzofuran. CAS Registry Number: 51207-31-9. Code used in CWA permitting for Great Lakes Bioaccumulative Chemicals of Concern.
2,3,7,8-Tetrachlorodibenzo-p-dioxin (only) / 2,3,7,8-Tetrachlorodibenzo-p-dioxin (only) Synonym 2,3,7,8-TCDD or TCDD
2,3-Dichloropropene / 2,3-Dichloropropene. CAS Registry Number: 78-88-6. Code related to a toxic chemical in the Toxics Release Inventory.
2,4,5-TP (Silvex) / 2,4,5-TP (Silvex). CAS Registry Number: 93-72-1. Code a Clean Water Act Non-Priority Pollutant. Code a Safe Drinking Water Act Standard.
2,4,5-Trichlorophenol / 2,4,5-Trichlorophenol. CAS Registry Number: 95-95-4. Code a Clean Water Act Organoleptic Pollutant.
2,4,6-Trichlorophenol / 2,4,6-Trichlorophenol. CAS Registry Number: 88-06-2. Code a Clean Water Act Priority Pollutant. Code a Clean Water Act Organoleptic Pollutant. Code pertains to Safe Drinking Water Act Unregulated Contaminants Monitoring Rule.
2,4-D / 2,4-D. CAS Registry Number: 94-75-7. Code a Clean Water Act Non-Priority Pollutant. Code a Safe Drinking Water Act Standard.
2,4-Diaminotoluene / 2,4-Diaminotoluene. CAS Registry Number: 95-80-7. Code related to a toxic chemical in the Toxics Release Inventory.
2,4-Dichlorophenol / 2,4-Dichlorophenol. CAS Registry Number: 120-83-2. Code a Clean Water Act Priority Pollutant. Code a Clean Water Act Organoleptic Pollutant. Code pertains to Safe Drinking Water Act Unregulated Contaminants Monitoring Rule.
2,4-Dimethylphenol / 2,4-Dimethylphenol. CAS Registry Number: 105-67-9. Code a Clean Water Act Priority Pollutant. Code a Clean Water Act Organoleptic Pollutant.
2,4-Dinitrophenol / 2,4-Dinitrophenol. CAS Registry Number: 51-28-5. Code a Clean Water Act Priority Pollutant. Code a Clean Water Act Non-Priority Pollutant. Code pertains to Safe Drinking Water Act Unregulated Contaminants Monitoring Rule.
2,4-Dinitrotoluene / 2,4-Dinitrotoluene. CAS Registry Number: 121-14-2. Code a Clean Water Act Priority Pollutant. Code pertains to Safe Drinking Water Act Unregulated Contaminants Monitoring Rule.
2,5-Dichlorophenol / 2,5-Dichlorophenol. CAS Registry Number: 583-78-8. Code a Clean Water Act Organoleptic Pollutant.
2,6-Dinitrotoluene / 2,6-Dinitrotoluene. CAS Registry Number: 606-20-2. Code a Clean Water Act Priority Pollutant. Code pertains to Safe Drinking Water Act Unregulated Contaminants Monitoring Rule.
2-Acetylaminofluorene / 2-Acetylaminofluorene. CAS Registry Number: 53-96-3. Code related to a toxic chemical in the Toxics Release Inventory.
2-Chloroethyl vinyl ether / 2-Chloroethyl vinyl ether. CAS Registry Number: 110-75-8. Code a Clean Water Act Priority Pollutant.
2-Chloronaphthalene / 2-Chloronaphthalene. CAS Registry Number: 91-58-7. Code a Clean Water Act Priority Pollutant.
2-Chlorophenol / 2-Chlorophenol. CAS Registry Number: 95-57-8. Code a Clean Water Act Priority Pollutant. Code a Clean Water Act Organoleptic Pollutant.
2-Ethoxyethanol / 2-Ethoxyethanol. CAS Registry Number: 110-80-5. Code related to a toxic chemical in the Toxics Release Inventory.
2-Methoxyethanol / 2-Methoxyethanol. CAS Registry Number: 109-86-4. Code related to a toxic chemical in the Toxics Release Inventory.
2-Methylnaphthalene / 2-Methylnaphthalene. CAS Registry Number: 91-57-6.
2-Methylpyridine / 2-Methylpyridine. CAS Registry Number: 109-06-8. Code related to a toxic chemical in the Toxics Release Inventory.
2-Nitrophenol / 2-Nitrophenol. CAS Registry Number: 88-75-5. Code a Clean Water Act Priority Pollutant.
3,3'-Dichlorobenzidine / 3,3'-Dichlorobenzidine. CAS Registry Number: 91-94-1. Code a Clean Water Act Priority Pollutant.
3,3'-Dimethoxybenzidine / 3,3'-Dimethoxybenzidine. CAS Registry Number: 119-90-4. Code related to a toxic chemical in the Toxics Release Inventory.
3,3'-Dimethylbenzidine / 3,3'-Dimethylbenzidine. CAS Registry Number: 119-93-7. Code related to a toxic chemical in the Toxics Release Inventory.
3,4-Dichlorophenol / 3,4-Dichlorophenol. CAS Registry Number: 95-77-2. Code a Clean Water Act Organoleptic Pollutant.
3-Chlorophenol / 3-Chlorophenol. CAS Registry Number: 108-43-0. Code a Clean Water Act Organoleptic Pollutant.
4,4-Dichloro-2-butene / 4,4-Dichloro-2-butene. CAS Registry Number: 764-41-0. Code related to a toxic chemical in the Toxics Release Inventory.
4,4'-Isopropylidenediphenol / 4,4'-Isopropylidenediphenol. CAS Registry Number: 80-05-7. Code related to a toxic chemical in the Toxics Release Inventory.
4,4'-Methylenebis / 4,4'-Methylenebis. CAS Registry Number: 101-14-4. Code related to a toxic chemical in the Toxics Release Inventory.
4-Aminobiphenyl / 4-Aminobiphenyl. CAS Registry Number: 92-67-1. Code related to a toxic chemical in the Toxics Release Inventory.
4-Bromophenylphenyl ether / 4-Bromophenylphenyl ether. CAS Registry Number: 101-55-3. Code a Clean Water Act Priority Pollutant.
4-Chloro-3-methylphenol (3-Methyl-4-Chlorophenol) / 4-Chloro-3-methylphenol (3-Methyl-4-Chlorophenol). CAS Registry Number: 59-50-7. Code a Clean Water Act Priority Pollutant. Code a Clean Water Act Organoleptic Pollutant.
4-Chlorophenol / 4-Chlorophenol. CAS Registry Number: 106-48-9. Code a Clean Water Act Organoleptic Pollutant.
4-Dimethylaminoazobenzene / 4-Dimethylaminoazobenzene. CAS Registry Number: 60-11-7. Code related to a toxic chemical in the Toxics Release Inventory.
4-Methylphenol / 4-Methylphenol. CAS Registry Number: 106-44-5.
4-Nitrophenol / 4-Nitrophenol. CAS Registry Number: 100-02-7. Code a Clean Water Act Priority Pollutant.
5-Nitro-o-toluidine / 5-Nitro-o-toluidine. CAS Registry Number: 99-55-8. Code related to a toxic chemical in the Toxics Release Inventory.
Abnormal Fish Deformities, Erosions, Lesions, Tumors (DELTS) / Abnormal Fish Deformities, Erosions, Lesions, Tumors (DELTs). Code described in the following EPA technical document(s): EPA-903-F-99-005.
Abnormal Fish Histology (Lesions) / Abnormal Fish Histology (Lesions). Code described in the following EPA technical document(s): EPA-903-F-99-005.
Acenaphthene / Acenaphthene. CAS Registry Number: 83-32-9. Code a Clean Water Act Priority Pollutant. Code a Clean Water Act Organoleptic Pollutant.
Acenaphthylene / Acenaphthylene. CAS Registry Number: 208-96-8. Code a Clean Water Act Priority Pollutant.
Acetaldehyde / Acetaldehyde. CAS Registry Number: 75-07-0. Code related to a toxic chemical in the Toxics Release Inventory.
Acetamide / Acetamide. CAS Registry Number: 60-35-5. Code related to a toxic chemical in the Toxics Release Inventory.
Acetochlor / Acetochlor. CAS Registry Number: 34256-82-1. Code pertains to Safe Drinking Water Act Unregulated Contaminants Monitoring Rule.
Acetonitrile / Acetonitrile. CAS Registry Number: 75-05-8. Code related to a toxic chemical in the Toxics Release Inventory.
Acidity (Cold Titration) / Acidity (Cold Titration)
Acidity, Hot (Hot Titration) / Acidity, Hot (Hot Titration)
Acrolein / Acrolein. CAS Registry Number: 107-02-8. Code a Clean Water Act Priority Pollutant.
Acrylamide / Acrylamide. CAS Registry Number: 79-06-1. Code a Safe Drinking Water Act Standard.
Acrylonitrile / Acrylonitrile. CAS Registry Number: 107-13-1. Code a Clean Water Act Priority Pollutant.
Alachlor / Alachlor. CAS Registry Number: 15972-60-8. Code a Safe Drinking Water Act Standard. Code pertains to Safe Drinking Water Act Unregulated Contaminants Monitoring Rule.
Aldicarb / Aldicarb. CAS Registry Number: 116-06-3
Aldrin / Aldrin. CAS Registry Number: 309-00-2. Code a Clean Water Act Priority Pollutant. Code used in CWA permitting for Great Lakes Bioaccumulative Chemicals of Concern.
Algal Growth Potential / Algal Growth Potential. The algal dry weight biomass that can be produced in a natural water sample under standardized laboratory conditions.
Alkalinity, Carbonate as CaCO3 / Alkalinity, Carbonate as CaCO3. Code a basic physical/chemical measurement. Additional information can be found in EPA's Terminology Reference System <
Alkylbenzene / Alkylbenzene: (Linear alkylbenzene) Colorless liquid. Class of chemicals with a straight Carbon chain, generally C6-C12, connected to a benzene ring. Uses include detergents and electrical cable insulation/corrosion protection.
Allyl alcohol / Allyl alcohol. CAS Registry Number: 107-18-6. Code related to a toxic chemical in the Toxics Release Inventory.
Allyl chloride / Allyl chloride. CAS Registry Number: 107-05-1. Code related to a toxic chemical in the Toxics Release Inventory.
Alpha particles / Alpha particles. CAS Registry Number: 12587-46-1. Code a Safe Drinking Water Act Standard.
alpha-Naphthylamine / alpha-Naphthylamine. CAS Registry Number: 134-32-7. Code related to a toxic chemical in the Toxics Release Inventory.
Alteration in stream-side or littoral vegetative covers / Alteration in stream-side or littoral vegetative covers. See technical discussion in: Federal Interagency Stream Restoration Working Group (ISRWG). 1998 (Updated 2001). Stream Corridor Restoration: Principles, Processes, and Practices. By the Federal Interagency Stream Restoration Working Group (FISRWG)(15 Federal agencies of the US gov't.). GPO Item No. 0120-A; SuDocs No. A 57.6/2:EN 3/PT.653
Alterations in wetland habitats / Alterations in wetland habitats. See technical discussion in: Federal Interagency Stream Restoration Working Group (ISRWG). 1998 (Updated 2001). Stream Corridor Restoration: Principles, Processes, and Practices. By the Federal Interagency Stream Restoration Working Group (FISRWG)(15 Federal agencies of the US gov't.). GPO Item No. 0120-A; SuDocs No. A 57.6/2:EN 3/PT.653
Alum (Aluminum Sulfate) / Alum (Aluminum Sulfate). CAS Registry Number: 10043-01-3.
Aluminum / Aluminum. CAS Registry Number: 7429-90-5. Code a Clean Water Act Non-Priority Pollutant. Code a Safe Drinking Water Act Standard.
Aluminum, dissolved / Aluminum, dissolved. CAS Registry Number: 7429-90-5. Code a Clean Water Act Non-Priority Pollutant. Code a Safe Drinking Water Act Standard.
Aluminum, total recoverable / Aluminum, total recoverable. CAS Registry Number: 7429-90-5. Code a Clean Water Act Non-Priority Pollutant. Code a Safe Drinking Water Act Standard.
Ambient Bioassays -- Acute Aquatic Toxicity / Ambient Bioassays -- Acute Aquatic Toxicity. Code commonly used in CWA NPDES permitting. Code related to toxic bioassays used for CWA permitting. Code described in the following EPA technical document(s): EPA 821-B-00-004. Code related to toxic bioassays used for CWA permitting.
Ambient Bioassays -- ChronicAquatic Toxicity / Ambient Bioassays -- ChronicAquatic Toxicity. Code commonly used in CWA NPDES permitting. Code related to toxic bioassays used for CWA permitting. Code described in the following EPA technical document(s): EPA 821-B-00-004. Code related to toxic bioassays used for CWA permitting.
Amitrole / Amitrole. CAS Registry Number: 61-82-5. Code related to a toxic chemical in the Toxics Release Inventory.
Ammonia (Total) / Nitrogen, ammonia. CAS Registry Number: 7727-37-9. Code commonly used in CWA NPDES permitting.
Ammonia (Un-ionized) / Ammonia (Unionized). CAS Registry Number: 7664-41-7. Code a Clean Water Act Non-Priority Pollutant. Code commonly used in CWA NPDES permitting.
Amnesic shellfish poisoning (ASP) biotoxins / Amnesic shellfish poisoning (ASP) biotoxins. A major category of human health impacts associated with toxins from "red tides" and similar harmful algal blooms in marine waters. See materials available through the Harmful Algal Page maintained by the National Office for Marine Biotoxins and Harmful Algal Blooms, Woods Hole Oceanographic Institution at the following Internet address:
Aniline / Aniline. CAS Registry Number: 62-53-3. Code related to a toxic chemical in the Toxics Release Inventory.
Anthracene / Anthracene. CAS Registry Number: 120-12-7. Code a Clean Water Act Priority Pollutant.
Antimony / Antimony. CAS Registry Number: 7440-36-0. Code a Clean Water Act Priority Pollutant. Code a Safe Drinking Water Act Standard.
Aquatic Algae / Aquatic Algae: Microscopic plants present in the water.
Aquatic Macroinvertebrate Bioassessments / Aquatic Macroinvertebrate Bioassessments. Code related to biological assessments to make use attainment conclusions. Code described in the following EPA technical document(s): EPA-841-B-99-002.
Aquatic Plant Bioassessments / Aquatic Plant Bioassessments. Code related to biological assessments to make use attainment conclusions. Code described in the following EPA technical document(s): EPA-841-B-99-002.
Aquatic Plants - Native / Aquatic Plants - Native. Noxious Aquatic Plants that are native to an area.
Aquatic Plants (Macrophytes) / Aquatic Plants (Macrophytes): Aquatic Plants large enough to be visible by the naked eye.
Arsenic / Arsenic. CAS Registry Number: 7440-38-2. Code a Clean Water Act Priority Pollutant. Code a Safe Drinking Water Act Standard.
Asbestos / Asbestos. CAS Registry Number: 1332-21-4. Code a Clean Water Act Priority Pollutant. Code a Safe Drinking Water Act Standard.
Atlantic Sea Lamprey, Petromyzon marinus / Atlantic Sea Lamprey, Petromyzon marinus (ITIS TSN 159722; STORET Characteristic ID 11264). National Invasive Species Council. 2001. National Management Plan: Meeting the Invasive Species Challenge. Available on Internet at:
Atrazine / Atrazine. CAS Registry Number: 1912-24-9. Code a Safe Drinking Water Act Standard.
Bacterial Slimes / Bacterial Slimes: Nuisance condition created by certain species of bacteria being present in the water.
Barium / Barium. CAS Registry Number: 7440-39-3. Code a Clean Water Act Non-Priority Pollutant. Code a Safe Drinking Water Act Standard.
Benthic-Macroinvertebrate Bioassessments / Benthic-Macroinvertebrate Bioassessments. Code related to biological assessments to make use attainment conclusions. Code described in the following EPA technical document(s): EPA-841-B-99-002.
Benzal chloride / Benzal chloride. CAS Registry Number: 98-87-3. Code related to a toxic chemical in the Toxics Release Inventory.
Benzene / Benzene. CAS Registry Number: 71-43-2. Code a Clean Water Act Priority Pollutant. Code a Safe Drinking Water Act Standard.
Benzidine / Benzidine. CAS Registry Number: 92-87-5. Code a Clean Water Act Priority Pollutant.
Benzo(a)pyrene (PAHs) / Benzo(a)pyrene (PAHs). CAS Registry Number: 50-32-8. Code a Clean Water Act Priority Pollutant. Code a Safe Drinking Water Act Standard.
Benzo[a]anthracene / Benzo[a]anthracene. CAS Registry Number: 56-55-3. Code a Clean Water Act Priority Pollutant.
Benzo[b]fluoranthene / Benzo[b]fluoranthene. CAS Registry Number: 205-99-2. Code a Clean Water Act Priority Pollutant.
Benzo[g,h,i]perylene / Benzo[g,h,i]perylene. CAS Registry Number: 191-24-2. Code a Clean Water Act Priority Pollutant.
Benzo[k]fluoranthene / Benzo[k]fluoranthene. CAS Registry Number: 207-08-9. Code a Clean Water Act Priority Pollutant.
Benzoic Acid / Benzoic Acid. CAS Registry Number: 65-85-0.
Benzoyl chloride / Benzoyl chloride. CAS Registry Number: 98-88-4. Code related to a toxic chemical in the Toxics Release Inventory.
Benzyl chloride / Benzyl chloride. CAS Registry Number: 100-44-7. Code related to a toxic chemical in the Toxics Release Inventory.
Beryllium / Beryllium. CAS Registry Number: 7440-41-7. Code a Clean Water Act Priority Pollutant. Code a Safe Drinking Water Act Standard.
Beta particles and photon emitters / Beta particles and photon emitters. CAS Registry Number: 12587-47-2. Code a Safe Drinking Water Act Standard.
beta-Naphthylamine / beta-Naphthylamine. CAS Registry Number: 91-59-8. Code related to a toxic chemical in the Toxics Release Inventory.
Biphenyl / Biphenyl. CAS Registry Number: 92-52-4. Code related to a toxic chemical in the Toxics Release Inventory.
Bis(2-chloro-1-methylethyl) / Bis(2-chloro-1-methylethyl). CAS Registry Number: 108-60-1. Code related to a toxic chemical in the Toxics Release Inventory.
Bis(2-Chloroethoxy)methane / Bis(2-Chloroethoxy)methane. CAS Registry Number: 111-91-1. Code a Clean Water Act Priority Pollutant.
Bis(2-chloroethyl) ether / Bis(2-chloroethyl) ether. Code a Clean Water Act Priority Pollutant. CAS Registry Number: 111444.
Bis(2-chloroisopropyl) ether / Bis(2-chloroisopropyl) ether. Code a Clean Water Act Priority Pollutant CAS Registry Number: 108601.
Bis(n-octyl) phthalate / Bis(n-octyl) phthalate. CAS Registry Number: 117-84-0. Code a Clean Water Act Priority Pollutant.
BOD, Biochemical oxygen demand / BOD, Biochemical oxygen demand. Code commonly used in CWA NPDES permitting. Code a basic physical/chemical measurement. Additional information can be found in EPA's Terminology Reference System <
BOD, carbonaceous / BOD, carbonaceous. Code commonly used in CWA NPDES permitting. Code a basic physical/chemical measurement. Additional information can be found in EPA's Terminology Reference System <