The first Friday of every month the Hubbard SWCD does free nitrate testing of private well water from 9 am to 2 pm at our office. To collect a sample, let your faucet run for a few minutes then collect 1 cup of water and put in a clean container. The sample does not need to be refrigerated. If you have a reverse osmosis system, please take a sample before and after the system. The test takes about 5 minutes to complete.