New industry standard for freezing point in milk

17 May 2021

A more scientifically robust industry standard for the interpretation of Freezing Point Depression (FPD) in milk has been developed after months of consultation.

Dairy UK and the National Milk Laboratories have developed a new UK industry standard following consultation across the dairy sector. It replaces the interpretation provided in British Standard (BS) 3095: Part 2: 1988, which has now been withdrawn.

New data

FPD is used as an indicator of extraneous water content which may have been added to milk and if milk is tested to be below the thresholds, it could be rejected or penalised. However, new data shows that the level has shifted over recent years.

Dairy UK commissioned the University of Reading to conduct a detailed analysis of the most recent FPD data and 16 million records were included. It found that over the period from 2006 to 2020, the average FPD in Great Britain has fallen from 521 m°C to 516 m°C.

Reviewed annually

New interpretation limits have now been set in line with the approach followed in the British Standard. The average and the standard deviation will be reviewed annually to ensure it is fit for purpose.

Based on the most recent data, the accept/reject threshold for milk should now be set at 505 m°C (rather than 509 m°C) for tanker and retail milk, which will limit tanker rejections.

Positive change

NFU dairy board chairman Michael Oakes said: “We welcome the announcement to move Freezing Point Depression levels, which recognises the changes to the British dairy herd and climate over the years. FPD has become an issue for some of our members recently, so updating the standard to be more scientifically robust, is a good step forward.

“We thank those involved in the supply chain for their efforts to make this change happen.”

Further reading

Read Dairy UK and the National Milk Laboratories Interpretation of freezing point depression in milk.

Ask us a question about this page

Once you have submitted your query our NFU CallFirst will contact you and, if appropriate, your question will be passed on to one of our policy teams.

By completing the form with your details on this page, you are agreeing to have this information sent to the NFU for the purposes of contacting you regarding your enquiry. Please take time to read the NFU’s Privacy Policy if you require further information.

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.