PHMSA letter of interpretation

Household Medical Waste

Pipeline and Hazardous Materials Safety Administration · Mar 24, 2000 · Reference No. 99-0106

PHMSA says to use caution with this letter.

Interprets: 49 CFR § 173.134

Reggie’s quick take

Someone asked PHMSA what counts as household waste, and why medical waste from a physician's office is regulated under the Hazardous Materials Regulations while medical waste from a home health care provider thrown out with household trash is not. The agency's answer is that household waste is not subject to the HMR, as stated in § 173.134(b)(1)(V). EPA first excluded household medical waste, including waste from home health care providers, when it set up its medical waste program in 1989, and PHMSA agreed with that position and kept a similar household exclusion when it added its own definition for regulated medical waste.

Written by AI (Claude) on Oct 22, 2026. Robots make mistakes and leave things out, so the letter below is what counts. Not legal advice.

This is in response to your letter concerning a provision in 49 CFR 173.134 that excepts waste transported from households from regulation under the Hazardous Materials Regulations (HMR; 49 CFR Parts 171-180). You asked for a clarification of what constitutes household waste. You also asked us to explain why regulated medical waste (RMW) that is transported by a courier from a physician's office is regulated under the HMR but it is not regulated when generated by a home health care provider and discarded in household waste. I apologize for the delay in responding and any inconvenience this may have caused.

Household waste is not subject to the requirements in the HMR. (See § 173.134(b)(1)(V).) In 1989, the Environmental Protection Agency (EPA) published an interim final rule (54 FR 12326, 12339) that implemented a two-year demonstration program for regulating medical waste. EPA excluded from regulation medical waste from households, including that generated by a home health care provider. I have enclosed a copy of the preamble discussion on household waste that appeared in the EPA final rule. We agreed with EPA's position. When we amended our infectious substance requirements in the HMR and added a definition for RMW, we provided a similar exclusion for household waste (56 FR 66124, 66142).

A letter of interpretation applies the regulations to the facts the requester described. It isn’t a regulation and isn’t legal advice. The agency’s copy.