EasyDisc R2A Test

Heterotrophic plate counts in 5–7 days

  • No equipment, autoclaving, or agar preparation
  • Results in 5–7 days when incubated at 20–28°C
  • Easy-to-count blue colonies, designed to correlate with the pour plate method (SM 9215) using Reasoner’s 2 agar1
  • Published by ASTM International as Standard D8516-23

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Gloved hand demonstrating how to use the IDEXX EasyDisc platform.

Easy-to-use platform reduces waste and improves workflow

  • 18-month shelf life eliminates waste and improves workflow
  • 1-minute hands-on time
  • Reduced QC
  • Available in both 25-pack and 100-pack configurations

Learn about the EasyDisc platform

Easy to run

Step 1 of IDEXX EasyDisc process

Step 1. Remove lid and add 1 mL sample to the EasyDisc R2A plate.

Step 2 of IDEXX EasyDisc process

Step 2. Gently swirl the plate to distribute the liquid, replace the lid, and incubate at room temperature for 20 minutes.

Step 3 of IDEXX EasyDisc process.

Step 3. Continue incubating at 20–28°C for 5–7 days.

Step 4 of IDEXX EasyDisc process.

Step 4. Count all colonies.

Frequently asked questions

The shelf life is up to 18 months from date of manufacture.

Yes, the base and lid are both sterilized. There are 25 plates per plastic sleeve. Any unused plates should remain in the bag and the bag should be closed. Do not leave any unused plates exposed to the environment.

The clear bottom portion of the plate is made of polystyrene #6 and is recyclable. The white cover/lid is made of low-density polyethylene #4 and is also recyclable.

Water samples are incubated at 20–28°C for 5–7 days.

Check with your local, state, and/or federal authorities for proper disposal of bacteriological biohazard materials at your facility.

Resources and tools

Tests and accessories

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Product information

EasyDisc R2A Test (25-test pack)
Product number: 98-0013457-00
Catalog number: WR2A25

EasyDisc R2A Test (100-test pack)
Product number: 98-0013456-00
Catalog number: WR2A100

Product number: 98-29006-01
Catalog number: WQC-HPC


IDEXX Water has reference materials and approval documents to support the many products in our water portfolio. Find the document(s) you need by selecting the link below.

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Water Customer Support

Corporate Headquarters
IDEXX Laboratories, Inc.
One IDEXX Drive
Westbrook, Maine 04092 USA

Tel: 1-800-321-0207
Fax: 1-207-556-4630

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ISO certifications

Locations and ISO certificates


1. 9215 Heterotrophic plate count. In: Baird RB, Eaton AD, Rice EW, eds. Standard Methods for the Examination of Water and Wastewater. 23rd ed. Washington, DC: American Public Health Association, American Water Works Association, Water Environment Federation; 2017.