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| Acronym | Acronym Meaning | Additional Information |
|---|---|---|
| C | Celsius | |
| C/D | Construction/Demolition Site | |
| C/E | Compliance and Enforcement | |
| C/MI | Grams per mile | |
| C/PC | Closure/Post Closure | |
| CA | Competition Advocate | |
| CA | Cooperative Agreements | |
| CA | Corrective Action | |
| CA | Citizen Act | |
| CAA | Clean Air Act | |
| CAA | Compliance Assurance Agreement | |
| CAA | Competition in Contracting Act | |
| CAAA | Clean Air Act Amendments | |
| CAATS | Computer Assisted Approval and Tracking System | |
| CAER | Community Awareness and Emergency Response | |
| CAFE | Corporate Average Fuel Economy | |
| CAFO | Consent Agreement/Final Order | |
| CAFO | Concentrated Animal Feeding Operation | |
| CAG | Carcinogenic Assessment Group | |
| CAIR | Clean Air Interstate Rule | |
| CAIR | Comprehensive Assessment of Information Rule | |
| CAM | Compliance Assurance Monitoring Rule | |
| CAM | Compliance Assurance Monitoring | |
| CAMP | Continuous Air Monitoring Program | |
| CAMU | Corrective Action Management Unit | |
| CAN | Common Account Number | |
| CAO | Corrective Action Order | |
| CAP | Community Assistance Program | |
| CAP | Compliance Advisory Panel | |
| CAP | Corrective Action Plan | |
| CAP | Corrective Action Program | |
| CAP | Cost Allocation Procedure | |
| CAP | Criteria Air Pollutant | |
| CAR | Corrective Action Report | |
| CAS | Chemical Abstract Service | |
| CAS | Center for Automotive Safety | |
| CAS# | Chemical Abstract Service Number | |
| CASAC | Clean Air Scientific Advisory Committee | |
| CASLP | Conference on Alternative State and Local Practices | |
| CASTNet | Clean Air Status and Trends Network | |
| CATS | Corrective Action Tracking System | |
| CAU | Carbon Adsorption Unit | |
| CAU | Command Arithmetic Unit | |
| CB | Continuous Bubbler | |
| CBA | Cost Benefit Analysis | |
| CBD | Central Business District | |
| CBED | Community Based Environmental Project | |
| CBI | Confidential Business Information | |
| CBI | Compliance Biomonitoring Inspection | |
| CBO | Congressional Budget Office | |
| CBOD | Carbonaceous Biochemical Oxygen Demand | |
| CBP | County Business Patterns | |
| CC/RTS | Chemical Collection/ Request Tracking System | |
| CCAP | Climate Change Action Plan | |
| CCAP | Center for Clean Air Policy | |
| CCBP | Coal Combustion By Products | |
| CCEA | Conventional Combustion Environmental Assessment | |
| CCHW | Citizens Clearinghouse for Hazardous Wastes | |
| CCID | Confidential Chemicals Identification System | |
| CCMS/NATO | Committee on Challenges of a Modern Society/North Atlantic Treaty Organization | |
| CCP | Coal Combustion Products | |
| CCP | Composite Correction Plan | |
| CCR | Consumer Confidence Report | |
| CCS | Clear, Consistent, and Speedy | |
| CCT | Clean Coal Technology | |
| CCTP | Clean Coal Technology Program | |
| CD | Climatological Data | |
| CD | Compact Disk | |
| CD | Consent Decree | |
| CDB | Consolidated Data Base | |
| CDBA | Central Data Base Administrator | |
| CDBG | Community Development Block Grant | |
| CDC | Centers for Disease Control | |
| CDD | Chlorinated dibenzo-p-dioxin | |
| CDF | Chlorinated dibenzofuran | |
| CDF | Confined Disposal Facility | |
| CDHS | Comprehensive Data Handling System | |
| CDI | Case Development Inspection | |
| CDI | Chronic Daily Intake | |
| CDM | Climatological Dispersion Model | |
| CDM | Comprehensive Data Management | |
| CDMQC | Climatological Dispersion Model with Calibration and Source Contribution | |
| CDNS | Climatological Data National Summary | |
| CDP | Census Designated Places | |
| CDS | Compliance Data System | |
| CE | Categorical Exclusion | |
| CE | Compliance and Enforcement | |
| CE | Conditionally Exempt Generator | |
| CEA | Cost and Economic Assessment | |
| CEA | Cooperative Enforcement Agreement | |
| CEAT | Contractor Evidence Audit Team | |
| CEB | Chemical Element Balance | |
| CEC | Commission for Environmental Cooperation | |
| CEC | Cation Exchange Capacity | |
| CECATS | CSB Existing Chemicals Assessment Tracking System | |
| CEE | Center for Environmental Education | |
| CEEM | Center for Energy and Environmental Management | |
| CEEP | Center for Energy and Environmental Policy | |
| CEI | Compliance Evaluation Inspection | |
| CEM | Compliance/Enforcement Management System | |
| CEM | Continuous Emission Monitoring | |
| CEMS | Continuous Emission Monitoring System | |
| CEPP | Chemical Emergency Preparedness Plan | |
| CEQ | Council on Environmental Quality | |
| CERCLA | Comprehensive Environmental Response, Compensation, and Liability Act (1980) | |
| CERCLIS | Comprehensive Environmental Response, Compensation, and Liability Information System | |
| CERFA | Community Environmental Response Facilitation Act | |
| CERT | Certificate of Eligibility | |
| CESQG | Conditionally Exempt Small Quantity Generator | |
| CEST | Community Environmental Service Teams | |
| CF | Conservation Foundation | |
| CFC | Chlorofluorocarbons | |
| CFM | Chlorofluoromethanes | |
| CFM | Cubic Feet per Minute | |
| CFO | Concentrated Feeding Operation | |
| CFO | Confined Feeding Operation | |
| CFR | Code of Federal Regulations | |
| CFS | Cubic Feet per Second | |
| CHABA | Committee on Hearing and Bio-Acoustics | |
| CHAMP | Community Health Air Monitoring Program | |
| CHEMNET | Chemical Industry Emergency Mutual Aid Network | |
| CHESS | Community Health and Environmental Surveillance System | |
| CHIP | Chemical Hazard Information Profiles | |
| CI | Contour Interval | |
| CI | Compression Ignition | |
| CI | Confidence Interval | |
| CIAQ | Council on Indoor Air Quality | |
| CIBL | Convective Internal Boundary Layer | |
| CICA | Competition in Contracting Act | |
| CICIS | Chemicals in Commerce Information System | |
| CIDRS | Cascade Impactor Data Reduction System | |
| CIMI | Committee on Integrity and Management Improvement | |
| CIS | Chemical Information System | |
| CIS | Contracts Information System | |
| CITES | Central Indiana Technical and Environmental Societies | |
| CKD | Cement Kiln Dust | |
| CKRC | Cement Kiln Recycling Coalition | |
| CL | Closure Level | |
| CLC | Capacity Limiting Constituents | |
| CLEANS | Clinical Laboratory for Evaluation and Assessment of Toxic Substances | |
| CLEVER | Clinical Laboratory for Evaluation and Validation of Epidemiologic Research | |
| CLF | Conservation Law Foundation | |
| CLI | Consumer Labeling Initiative | |
| CLIPS | Chemical List Index and Processing System | |
| CLP | Contract Laboratory Program | |
| CM | Corrective Measure | |
| CMA | Chemical Manufacturers Association | |
| CMB | Chemical Mass Balance | |
| CME | Comprehensive Monitoring Evaluation | |
| CMEL | Comprehensive Monitoring Evaluation Log | |
| CMEP | Critical Mass Energy Project | |
| CMS | Corrective Measures Study | |
| CMTB | Clean Manufacturing Technology Board | |
| CMTI | Clean Manufacturing Technology and Safe Materials Institute | |
| CNG | Compressed Natural Gas | |
| CNTS | Covenant Not To Sue | |
| CO | Carbon Monoxide | |
| CO | Commissioner's Order | |
| CO2 | Carbon Dioxide | |
| COC | Certificate of Completion | |
| COC | Chain of Custody | |
| COC | Chemical of Concern | |
| COC | Constituent of Concern | |
| COC | Contaminant of Concern | |
| COCO | Contractor-Owned/ Contractor-Operated | |
| COD | Chemical Oxygen Demand | |
| COE | Corps of Engineers | |
| COG | Coefficient Of Haze | |
| COI | Constituent of Interest | |
| COMS | Continuous Emissions Monitoring System | |
| COP | Current Operating Procedure | |
| COPAS | Coastal Ocean Pollution Assessment | |
| CP | Construction Permit | |
| cPAH | Carcinagenic Polynuclear Aromatic Hydrocarbons | |
| CPDA | Chemical Producers and Distributor Association | |
| CPE | Comprehensive Performance Evaluation | |
| CPF | Carcinogenic Potency Factor | |
| CPM | Core Performance Measure | |
| CPO | Certified Project Officer | |
| CPT | Cone Penetrometer Technology | |
| CQA | Construction Quality Assurance | |
| CR | Continuous Radon Monitoring | |
| CRAI | Completeness request for Additional Information | |
| CRDL | Contract Required Detection Limit | |
| CRL | Central Regional Laboratory | |
| CROP | Consolidated Rules of Practice | |
| CRP | Child-Resistant Packaging | |
| CRP | Conservation Reserve Program | |
| CRP | Community Relations Plan | |
| CRQL | Contract Required Quantitation Limit | |
| CRR | Center for Renewable Resources | |
| CRSTER | Single Source Dispersion Model | |
| CSCT | Committee for Site Characterization | |
| CSGWPP | Comprehensive State Ground Water Protection Program | |
| CSI | Compliance Sampling Inspection | |
| CSI | Common Sense Initiative | |
| CSI | Conversion Systems Incorporated | |
| CSIN | Chemical Substances Information Network | |
| CSM | Conceptual Site Model | |
| CSMA | Chemical Specialties Manufacturers Association | |
| CSO | Combined Sewer Overflow | |
| CSPA | Council of State Planning Agencies | |
| CSRL | Center for the Study of Responsive Law | |
| CSS | Combined Sewer System | |
| CT | Product of Residual Disinfectant Concentration and Corresponding Disinfectant Contact Time | |
| CTAP | Compliance and Technical Assistance Program (IDEM) | |
| CTARC | Chemical Testing and Assessment Research Commission | |
| CTE | Central Tendency Exposure | |
| CTG | Control Techniques Guidelines | |
| CTSA | Cleaner Technologies Substitutes Assessment | |
| CTV | Critical Toxicity Value | |
| CV | Coefficient of Variation | |
| CV | Chemical Vocabulary | |
| CVS | Constant Volume Sampler | |
| CW | Continuous working-level monitoring | |
| CWA | Clean Water Act (aka FWPCA) | |
| CWA | Clean Water Action | |
| CWAP | Clean Water Action Project | |
| CWOP | Construction Without a Permit | |
| CWS | Community Water System | |
| CWTC | Chemical Waste Transportation Council | |
| CZARA | Coastal Zone Management Act Reauthorization Amendments | |
| CZMA | Coastal Zone Management Act |
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