Product number: NCM0185

Water Plate Count Agar is a non-selective medium which conforms to ISO 6222:1999, and is not intended for use in the diagnosis of disease or other conditions in humans.

Water Plate Count Agar allows the enumeration of culturable microorganisms, which can be used for the assessment and surveillance of water quality. Colony counts are useful for assessment of ground water integrity and the efficiency of water treatment processes. They also give an indication of the cleanliness and integrity of the distribution system. They can be used to assess the suitability of a water supply for the preparation of food and drink, thus avoiding contamination of the product with spoilage organisms. The main value of colony counts lies in the detection of changes in water supply quality from those expected, based on frequent long-term monitoring. A sudden increase in the numbers can be a warning of pollution and can call for immediate remedial action.


Formula Liter
Tryptone 6.0 g/L
Yeast Extract 3.0 g/L
Agar 15.0 g/L

Final pH: 7.2 ± 0.2 at 25°C
Formula may be adjusted and/or supplemented as required to meet performance specifications.


  1. Suspend 24.0 grams of the medium in one liter of purified water.
  2. Heat with frequent agitation and boil for one minute to completely dissolve the medium.
  3. Autoclave at 121°C for 15 minutes.
  4. Cool to 45-50°C.

Product was previously known as LabM Product: LAB197 Water Plate Count Agar

Order Details

Product # Product Description
NCM0185A Water Plate Count Agar, 500 g
NCM0185B Water Plate Count Agar, 5 kg
NCM0185C Water Plate Count Agar, 10 kg
NCM0185D Water Plate Count Agar, 25 kg (European only size)
NCM0185E Water Plate Count Agar, 50 kg (US only size)

Reference Material

NCM0185 - Water Plate Count Agar, Safety Data Sheet [Danish] [Dutch] [English] [EU English] [Finnish] [French] [German] [Italian] [Spanish, Mexico] [Swedish]
NCM0185 - Water Plate Count Agar, Technical Specifications Sheet [English]

For additional information or questions about product SDS documents, please contact Neogen at

Please check with your local representative for availability of these products within your region.