It's not always possible to buy organic as sometimes it's not available, in season, or the cost is prohibitive. Pesticide Action Network UK (PAN) test regularly and are a handy reference guide to what is best in the UK. EWG.org are similar in the US.
Refer to this website seasonally to see what fruits and vegetables test best, and what you should avoid unless organic.
Deborah McTaggart is a registered nutritionist practising in Barnes, South West London, and global via Skype and Zoom. Deborah has a special interest in high energy demand, high performance, travel health, stress and sport recovery and performance for the busy professional, frequent traveller and recreational athlete.
Deborah works as a Consultant with The Resilience Institute, UK who work with global leadership to sustain high performance and long term health resilience. Contact me here for further information on eating healthy for busy people and improving your health.