IRIS Assessment Plan for Nitrate and Nitrite (Scoping and Problem Formulation Materials)
U.S. EPA. IRIS Assessment Plan for Nitrate and Nitrite (Scoping and Problem Formulation Materials). U.S. Environmental Protection Agency, Washington, DC, EPA/635/R-17/331, 2017.
Nitrate (NO3−) and nitrite (NO2−), naturally occurring anions in the environment, play an essential role in Earth’s nitrogen cycle. Since 1950, human sources of nitrogen have increased substantially, creating a global surplus of nitrate/nitrite that supersedes natural sources by about 30%. Nitrate salts are mainly used as nitrogen fertilizers and in industrial explosives, fireworks, and glass making, whereas nitrites are largely used as preservatives for meat and fish curing and as color fixatives.
|Sep 2017||EPA released the IRIS Assessment Plan (IAP) for Nitrate and Nitrite for public comment and review. [Federal Register Notice Sep 18, 2017]|
Following the SAB public meeting, the IRIS Program will use the IAP to inform the subsequent development of chemical-specific systematic review protocols.
This download(s) is distributed solely for the purpose of pre-dissemination peer review under applicable information quality guidelines. It has not been formally disseminated by EPA. It does not represent and should not be construed to represent any Agency determination or policy.
Federal Register Notices
Comments on the assessment may be submitted and reviewed using the Docket ID EPA-HQ-ORD-2017-0496