usda rural development Income Limits New Home Loans The low-interest loan, backed by the Essex county improvement district. Tests at two filter-equipped homes this past August revealed lead levels of 55 parts per billion-more than three times the.Home Purchase Programs Usda Loan Eligibility By Address The USDA website also has verbal description of the eligible areas. Only those counties that have a combination of eligible and ineligible areas have a description link. All the properties in non-linked counties in a given state qualify for USDA loans. Click on the relevant state link to access the USDA property eligibility areas.