EPA IRIS Assessment Sets Ammonia Risk Value Stricter Than OSHA Limit

EPA's recent assessment of the human health risks of ammonia, a substance used to produce fertilizer, detergent and other products, adopts a risk value that is far more stringent than limits that OSHA and NIOSH have published to protect workers and which industry urged EPA to adopt though it is slightly weaker than EPA's 1991 standard. EPA Sept. 20 released its final Integrated Risk Information System (IRIS) assessment for ammonia , which updates EPA's previous 1991 assessment and calculates a...