20 CFR §654.404

1. (a)Housing sites must be well drained and free from depressions in which water may stagnate. They must be located where the disposal of sewage is provided in a manner which neither creates nor is likely to create a nuisance, or a hazard to health.
2. (b)Housing must not be subject to, or in proximity to, conditions that create or are likely to create offensive odors, flies, noise, traffic, or any similar hazards.
3. (c)Grounds within the housing site must be free from debris, noxious plants (poison ivy, etc.) and uncontrolled weeds or brush.
4. (d)The housing site must provide a space for recreation reasonably related to the size of the facility and the type of occupancy.