THE PPDB
Purchasing and licensing - Calculated data

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Calculated data available

Several parameters displayed online do not exist in the database because they are calculated (using other properties). These calculated data include:

• Fate indices: This includes the GUS leaching potential index; SCI-GROW groundwater index; Potential for particle bound transport index; and Potential for loss via drain flow.
• Pesticide Hazard Tricolour (PHT) alerts: The hazard alert system displayed at the top of each substance record.
• Regulatory Threshold Levels (RTLs): Based on ecotoxcity endpoints for nine species groups, used to calculate the Total Applied Toxicity (TAT) indicator.
• Highly Hazardous Pesticide (HHPs): Whether a substance is classified as a Type I or Type II HHP, plus the criteria that trigger this.

This data can be purchased either in a stand-alone format or as an addition to the full PPDB (at a 40% discount), so:

Licence	Stand-alone price	With Full PPDB (40% discount on extra data)
Any or all fate indices	£150	Included
Pesticide Hazard Tricolour (PHT) alerts	£150	£882
Regulatory Threshold Levels (RTLs)	£150	£882
Highly Hazardous Pesticide (HHPs)	£150	Included
Combinations:	-	-
2 of the above (25% discount)	£225	£827
3 of the above (33% discount)	£302	£973
4 of the above (40% discount)	£360	£1008

To obtain any of these data sets email the team at aeru@herts.ac.uk

Note: VAT is charged on all prices when applicable.

Note: Prices quoted on this site are valid till 1 March 2026, after which there will be a 5% increase.