ERA has specially designed reference materials and PT standards to help you improve and document the quality of all of your microbiology analyses. Our exclusive lyophilized standards are the easiest to use, most stable products available.

Water Pollution

Water Supply

ERA's Water Supply proficiency test (PT) products meet all USEPA and NELAC requirements. Year after year, thousands of labs trust these standards to meet their QA program and accreditation requirements.

Analyte categories available:

Inorganics

Organics