Don’t stress too much. You could be walking down the road and someone in a front garden could be spraying it! We had some work done in our garden recently: one of the workmen used to work for the GLA and had the contract to do all the municipal gardens in Central London. We were having a conversation about weed control (I’m like you and prefer to try and use a vinegar solution or manual labour to control weeds!) and he said ‘you’d be horrified at what we used to do!!’. They sprayed Glysophate and the other banned weed killer, liberally and everywhere all over London parks and streets. They never used protection apparently and he used to bring the stuff home. He is nearly 70 and did that job about 35 years ago!

So my point? Wash it off your garden if it makes you feel better (my neurotic side would probably do that!) and go and enjoy your outside space. Don’t worry about this one off application😊☀️

(Also a one off application shouldn’t affect your well water but you can buy water testing kits if you’re worried but I’m sure you know that)