The streets of San Francisco are slightly cleaner than they were a year ago, according to the city's newly released Street & Sidewalk Maintenance Standards report for fiscal year 2015-16.

But there are still significant problems.

If you're visiting San Francisco and you don't routinely wear hazmat boots, you might want to avoid certain areas. Here's a handy guide:

Most likely place to step in poo: District 6, specifically in the Tenderloin and south of 8th Street between Mission and Howard streets.

At times, traversing District 6 can seem like crossing a minefield. It had more than three times the service requests related to human waste (7,509) than the next highest district, District 9. District 9, which encompasses the Mission, reported 2,621 excrement-related requests. Overall, human waste reports were up 39 percent year over year.

Least likely place to step in poo: District 4. You won't have to hopscotch around steamy piles in the Sunset. It logged only 112 human waste reports in 2015-16.

Best place to mainline drugs (apparently): District 6 again. The district had more than double the number of public service requests regarding discarded hypodermic needles (1,106) than the next highest, District 9. Needle clusters also plagued the Castro, Hayes Valley, Civic Center and Potrero Hill neighborhoods. Overall, San Francisco saw a 41 percent increase over the previous year.

Most needle-free areas: District 7 (Twin Peaks) — 14 and District 4 (Sunset) — 19.

Mostly likely place to have your car window smashed: District 6 (352 broken-glass reports) followed by District 3 (North Beach) and District 9 (Mission), both with 250 reports. There was a sudden and significant increase in public reports of broken glass

in all supervisorial districts April 24 through at least June 25, which might be attributed to an increase in public awareness following media reports on "smash and grab" crimes in the city.

Safest place for car windows: District 7 (60 reports).

Most often targeted by graffiti vandals: District 9 (the Mission) with 12,392 reports, followed closely by District 5 (Western Addition, Haight Ashbury and Inner Sunset) at 12,340. But the biggest increase in service requests regarding tagged buildings or property was seen in District 6 (South of Market, Tenderloin) — a 54 percent jump to 10,058.

Best place to score a used couch or refrigerator: McLaren Park. Parks and other open spaces tend to be the most popular spots for illegally dumping furniture or appliances. Runner-ups include Land's End, Golden Gate Park, Buena Vista Park and Dolores Park.

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Biggest improvement in reducing sidewalk litter: The Mission, Bernal Heights and Noe Valley.