The water test report must not be more than 150 days old at the time the credit is made. If the USDA is aware of recent environmental effects that could invalidate the screening analysis (for example. B chemical leaks, natural disasters, etc.), a new report may be needed. Conventional: When public water and/or sanitation facilities are not available, private well and septic facilities must be available and used by the property concerned. Private institutions must be viable and sufficient to serve the property concerned. As a rule, the private well and septic systems should be on the subject`s land. .