50-State Ammonia Refrigeration & PSM Safety Laws
State-by-state OSHA Process Safety Management (PSM 29 CFR 1910.119), EPA Risk Management Program (RMP 10,000 lb threshold), and IIAR 2 mechanical room ventilation codes.
| State | State Workplace Safety & Environmental Agency | EPA RMP & OSHA PSM Threshold | Mechanical Room IIAR 2 Emergency Ventilation | Annual Ammonia Leak Sensor Calibration |
|---|---|---|---|---|
| Alabama | Federal OSHA / ADEM Air & Water | > 10,000 lbs RMP / OSHA PSM | IIAR 2 (ASHRAE 15 Compliant) | Semi-Annual Sensor Calibration |
| Alaska | Alaska OSH (AKOSH) / ADEC | > 10,000 lbs RMP / AKOSH Mandate | Mandatory Arctic Freeze Interlocks | Quarterly Sensor Calibration |
| Arizona | Arizona ADOSH / ADEQ | > 10,000 lbs PSM / Tier II Reporting | IIAR 2 Standard Emergency Exhaust | Annual Audit & Calibration |
| Arkansas | Arkansas Department of Labor / ADEQ | > 10,000 lbs EPA RMP Program 3 | ASHRAE 15 Mechanical Ventilation | Semi-Annual Calibration |
| California | Cal/OSHA PSM (8 CCR § 5189) & CalARP | CalARP > 500 lbs (Strictest in US) | Mandatory Dual-Speed Exhaust + Flare/Scrubber | Quarterly Mandatory Audit |
| Colorado | CDPHE / Federal OSHA Region 8 | > 10,000 lbs EPA RMP / PSM | IIAR 2 Emergency Exhaust Systems | Semi-Annual Calibration |
| Connecticut | CONN-OSHA / CT DEEP | > 10,000 lbs RMP / OSHA PSM | ASHRAE 15 Emergency Ventilation | Annual Calibration & Testing |
| Delaware | DNREC Accidental Release Prevention (7 DE Admin 1125) | > 5,000 lbs State ARP Program | Mandatory Automated Dampers & Alarms | Semi-Annual Calibration |
| Florida | Federal OSHA / FDEP Emergency Response | > 10,000 lbs EPA RMP / PSM | IIAR 2 Standard Mechanical Rooms | Annual Sensor Certification |
| Georgia | Federal OSHA / Georgia EPD | > 10,000 lbs EPA RMP Program 3 | ASHRAE 15 / IIAR 2 Ventilation | Semi-Annual Calibration |
| Hawaii | Hawaii HIOSH / DOH HEER Office | > 10,000 lbs State PSM Mandate | Mandatory Corrosion-Resistant Exhaust | Quarterly Sensor Testing |
| Idaho | Federal OSHA / IDEQ | > 10,000 lbs EPA RMP Compliance | IIAR 2 Mechanical Room Exhaust | Annual Calibration |
| Illinois | Illinois EPA / Federal OSHA Region 5 | > 10,000 lbs EPA RMP / PSM | ASHRAE 15 / Chicago Mechanical Code | Semi-Annual Sensor Testing |
| Indiana | IOSHA Process Safety / IDEM | > 10,000 lbs IOSHA PSM Standard | IIAR 2 Emergency Ventilation | Annual Audit & Testing |
| Iowa | Iowa OSHA / Iowa DNR | > 10,000 lbs EPA RMP / PSM | ASHRAE 15 Mechanical Standards | Semi-Annual Calibration |
| Kansas | Federal OSHA / KDHE Bureau of Air | > 10,000 lbs EPA RMP Program 3 | IIAR 2 Standard Ventilation | Annual Sensor Testing |
| Kentucky | Kentucky OSH (KY OSH) / EEC | > 10,000 lbs KY OSH Process Safety | ASHRAE 15 Emergency Exhaust | Semi-Annual Calibration |
| Louisiana | Louisiana DEQ / Federal OSHA Region 6 | > 10,000 lbs EPA RMP / PSM | IIAR 2 High-Humidity Exhaust | Semi-Annual Calibration |
| Maine | Maine DEP / Federal OSHA | > 10,000 lbs EPA RMP Compliance | ASHRAE 15 Cold Climate Ventilation | Annual Testing |
| Maryland | Maryland MOSH / MDE Emergency Response | > 10,000 lbs MOSH PSM Standard | IIAR 2 Mechanical Room Codes | Semi-Annual Calibration |
| Massachusetts | MassDEP Toxics Use / Federal OSHA | > 10,000 lbs PSM + TURA Reporting | Mandatory Fire Dept Emergency Exhaust | Quarterly Sensor Testing |
| Michigan | MIOSHA General Industry Safety (Part 591) | > 10,000 lbs MIOSHA PSM Standard | IIAR 2 Standard Emergency Exhaust | Annual Audit & Calibration |
| Minnesota | Minnesota MNOSHA / MPCA | > 10,000 lbs MNOSHA PSM Program | ASHRAE 15 / Minnesota Mechanical Code | Semi-Annual Calibration |
| Mississippi | Federal OSHA / MDEQ | > 10,000 lbs EPA RMP Program 3 | IIAR 2 Standard Ventilation | Annual Sensor Calibration |
| Missouri | Federal OSHA / Missouri DNR | > 10,000 lbs EPA RMP / PSM | ASHRAE 15 Emergency Exhaust | Semi-Annual Calibration |
| Montana | Montana DEQ / Federal OSHA | > 10,000 lbs EPA RMP Compliance | IIAR 2 Low-Temp Mechanical Codes | Annual Testing |
| Nebraska | Federal OSHA / NDEE | > 10,000 lbs EPA RMP Program 3 | ASHRAE 15 Mechanical Standards | Annual Sensor Testing |
| Nevada | Nevada SCATS (CAPP Program - NAC 459) | CAPP > 5,000 lbs State Mandate | Mandatory High-Desert Emergency Exhaust | Quarterly Calibration & Audit |
| New Hampshire | NHDES / Federal OSHA | > 10,000 lbs EPA RMP Compliance | IIAR 2 Mechanical Room Exhaust | Annual Sensor Testing |
| New Jersey | NJDEP Toxic Catastrophe Prevention Act (TCPA) | NJ TCPA > 5,200 lbs Threshold | Mandatory Scrubber / Continuous Exhaust | Quarterly Mandatory Audit |
| New Mexico | New Mexico OSHA (NM OSHA) / NMED | > 10,000 lbs NM OSHA PSM Standard | IIAR 2 Standard Emergency Exhaust | Semi-Annual Calibration |
| New York | NYS DEC Chemical Bulk Storage (Part 596) / NYC DOB | > 10,000 lbs PSM (NYC FDNY Certificate) | NYC Mechanical Code Emergency Scrubbers | Quarterly Sensor Testing |
| North Carolina | NC Department of Labor (NC OSHA) / NC DEQ | > 10,000 lbs NC OSHA PSM Mandate | IIAR 2 Standard Ventilation | Semi-Annual Calibration |
| North Dakota | ND DEQ / Federal OSHA | > 10,000 lbs EPA RMP Compliance | ASHRAE 15 Winterized Ventilation | Annual Testing |
| Ohio | Ohio EPA / Federal OSHA Region 5 | > 10,000 lbs EPA RMP / PSM | IIAR 2 Standard Mechanical Rooms | Semi-Annual Calibration |
| Oklahoma | Oklahoma DEQ / Federal OSHA | > 10,000 lbs EPA RMP Program 3 | ASHRAE 15 Emergency Exhaust | Annual Sensor Testing |
| Oregon | Oregon OSHA (OAR 437-002-1910.119) | > 10,000 lbs OR-OSHA PSM Standard | IIAR 2 Mechanical Code Standards | Semi-Annual Calibration |
| Pennsylvania | PA DEP Bureau of Air Quality / OSHA | > 10,000 lbs EPA RMP / PSM | ASHRAE 15 / UCC Mechanical Codes | Semi-Annual Sensor Testing |
| Rhode Island | RIDEM / Federal OSHA | > 10,000 lbs EPA RMP Compliance | IIAR 2 Emergency Exhaust Systems | Annual Calibration |
| South Carolina | SC OSHA / SC DHEC | > 10,000 lbs SC OSHA PSM Mandate | ASHRAE 15 Mechanical Standards | Semi-Annual Calibration |
| South Dakota | SD DANR / Federal OSHA | > 10,000 lbs EPA RMP Compliance | IIAR 2 Standard Ventilation | Annual Sensor Testing |
| Tennessee | TOSHA Process Safety / TDEC | > 10,000 lbs TOSHA PSM Standard | IIAR 2 Standard Mechanical Rooms | Semi-Annual Calibration |
| Texas | Texas TCEQ / Federal OSHA Region 6 | > 10,000 lbs EPA RMP / PSM | ASHRAE 15 / Gulf Coast Ventilation | Semi-Annual Calibration |
| Utah | Utah UOSH / Utah DEQ | > 10,000 lbs UOSH PSM Standard | IIAR 2 High-Altitude Ventilation | Annual Sensor Testing |
| Vermont | VOSHA / Vermont DEC | > 10,000 lbs VOSHA PSM Standard | ASHRAE 15 Winterized Exhaust | Annual Calibration |
| Virginia | VOSH Process Safety / VDEQ | > 10,000 lbs VOSH PSM Standard | IIAR 2 Standard Emergency Exhaust | Semi-Annual Calibration |
| Washington | Washington DOSH (WAC 296-67 PSM) | > 10,000 lbs WA DOSH PSM Mandate | IIAR 2 / Pacific NW Seismic Standards | Quarterly Sensor Testing |
| West Virginia | WV DEP / Federal OSHA | > 10,000 lbs EPA RMP Compliance | ASHRAE 15 Emergency Exhaust | Annual Sensor Testing |
| Wisconsin | Wisconsin DWD / WDNR | > 10,000 lbs EPA RMP / PSM | IIAR 2 Dairy / Cold Chain Standards | Semi-Annual Calibration |
| Wyoming | Wyoming OSHA / WDEQ | > 10,000 lbs WY-OSHA PSM Standard | ASHRAE 15 Winterized Ventilation | Annual Testing |