WASHINGTON — Rates on 30-year mortgages edged up slightly this week but still remained near the lowest level for the year.

Mortgage giant Freddie Mac reported yesterday that 30-year fixed-rate mortgages averaged 6.16 percent this week.

That was the second-lowest level for the year, up only slightly from the low for this year of 6.14 percent, where 30-year rates had been for the two previous weeks.

Rates on 15-year fixed-rate mortgages, a popular choice for refinancing, edged up slightly this week as well, rising to 5.90 percent, up from 5.88 percent.

Five-year adjustable-rate mortgages averaged 5.91 percent, up from 5.90 percent last week.