noun
maximum permissible level; tolerable limit; allowable dosage
Used in technical, medical, and regulatory contexts for the upper limit of a substance, radiation, or other factor that is considered safe or acceptable.
食品添加物の許容量は法律で定められている。
The maximum permissible levels of food additives are set by law.
放射線の年間許容量を超えてはいけない。
You must not exceed the annual allowable dose of radiation.
限度 is a general limit or bound; 許容量 is a limit based on safety or tolerance standards.
Compound of 許容 (permission, tolerance) and 量 (amount, quantity).