Generated Narrative: CodeSystem usEPAsrs This case-sensitive code system http://terminology.hl7.org/CodeSystem/usEPAsrs defines codes, but no codes are represented here
The United States Environmental Protection Agency's (US EPA) Substance Registry System (SRS) provides information on substances and how they are represented in US environmental statutes, in US EPA information systems, and in information systems owned by other organizations. The SRS provides standardized identification for each substance to improve data quality in US EPA systems and elsewhere.