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In total, it seems 96 bags of poop, urine and puke were left on its surface (couldn't find a definitive source yet, just several articles repeating this claim; by my own count from NASA's list [see below], there were at least 32 body fluid bags left on the Moon). Using the poop bags wasn't a nice experience, as Micheal Collins wrote in Carrying the fire: after defecation you had to add a small bag with some chemicals and then knead the whole thing to kill of the bacteria (this was done to all poop bags, as far as I know, not only those left on the moon).

Whether any of the bags left on the Moon contained fecal matter is hard to say.

There's an article at Vox.com about this and what we could learn from collecting those bags. The article claims:

Apollo 16 astronaut Charlie Duke spent 71 hours on the moon in 1972. On a recent phone call, he confirmed that the crew left human waste behind.

“We did,” he says. “We left urine that was collected in a tank ... and I believe we had a couple of bowel movements — but I’m not sure — those were in a trash bag. We had a couple of bags of trash we kicked out on the lunar surface.”

In response to this article, Buzz Aldrin wrote on Twitter:

Well, I sure feel bad for whoever finds my bag 💩

But this is no definitive statement that his bags did contain fecal matter.

There is also the NASA Catalogue of Manmade Material on the Moon which, for Apollo 11, lists four Defecation Collection Devices. Looking at the review of spacecraft waste-management systems, it becomes apparent that this is official name for the poop bags. Since this list is very detailed, there probably exist reports for each mission listing these items. It does not list whether these were used or unused.

The SP-368 Biomedical Results of Apollo does list details of samples returned from the missions (there are… interesting tables in there) but doesn't say anything about matter left on the Moon.

tl;dr: The only source found so far is an article that claims that Charlie Duke claims to have left urine on the Moon. No definitive report about fecal matter on the Moon, though.

In total, it's claimed by several sources (probably all copying one article) that 96 bags of poop, urine and puke were left on its surface. By my own count from NASA's list (see below), there were at least 32 body fluid bags left on the Moon. Whether any of the bags left on the Moon contained fecal matter is hard to say. 

Using the poop bags wasn't a nice experience, as Micheal Collins wrote in Carrying the fire: after defecation you had to add a small bag with some chemicals and then knead the whole thing to kill of the bacteria (this was done to all poop bags, as far as I know, not only those left on the moon).

There's an article at Vox.com about this and what we could learn from collecting those bags. The article claims:

Apollo 16 astronaut Charlie Duke spent 71 hours on the moon in 1972. On a recent phone call, he confirmed that the crew left human waste behind.

“We did,” he says. “We left urine that was collected in a tank ... and I believe we had a couple of bowel movements — but I’m not sure — those were in a trash bag. We had a couple of bags of trash we kicked out on the lunar surface.”

In response to this article, Buzz Aldrin wrote on Twitter:

Well, I sure feel bad for whoever finds my bag 💩

But this is no definitive statement that his bags did contain fecal matter.

There is also the NASA Catalogue of Manmade Material on the Moon which, for Apollo 11, lists four Defecation Collection Devices. Looking at the review of spacecraft waste-management systems, it becomes apparent that this is official name for the poop bags. Since this list is very detailed, there probably exist reports for each mission listing these items. It does not list whether these were used or unused.

The SP-368 Biomedical Results of Apollo does list details of samples returned from the missions (there are… interesting tables in there) but doesn't say anything about matter left on the Moon.

Another interesting document is the Apollo Experience Report - Crew Provisions And Equipment Subsystem. It says:

Lunar module waste-management system. - To prevent contamination on the lunar surface, the LM waste-management system uses a pressure-operated urine-collection system.

(Emphasize mine.) This may be an indicator that the bags left on the Moon were (supposed to be) empty.

In total, it seems 96 bags of poop, urine and puke were left on its surface (couldn't find a definitive source yet, just several articles repeating this claim). Using the poop bags wasn't a nice experience, as Micheal Collins wrote in Carrying the fire: after defecation you had to add a small bag with some chemicals and then knead the whole thing to kill of the bacteria (this was done to all poop bags, as far as I know, not only those left on the moon).

There's an article at Vox.com about this and what we could learn from collecting those bags.

  The article claims:

Apollo 16 astronaut Charlie Duke spent 71 hours on the moon in 1972. On a recent phone call, he confirmed that the crew left human waste behind.

“We did,” he says. “We left urine that was collected in a tank ... and I believe we had a couple of bowel movements — but I’m not sure — those were in a trash bag. We had a couple of bags of trash we kicked out on the lunar surface.”

In response to this article, Buzz Aldrin wrote on Twitter:

Well, I sure feel bad for whoever finds my bag 💩

But this is no definitive statement that his bags did contain fecal matter.

There is also the NASA Catalogue of Manmade Material on the Moon which, for Apollo 11, lists four Defecation Collection Devices. Looking at the review of spacecraft waste-management systems, it becomes apparent that this is official name for the poop bags. Since this list is very detailed, there probably exist reports for each mission listing these items. It does not list whether these were used or unused.

In total, it seems 96 bags of poop, urine and puke were left on its surface (couldn't find a definitive source yet, just several articles repeating this claim; by my own count from NASA's list [see below], there were at least 32 body fluid bags left on the Moon). Using the poop bags wasn't a nice experience, as Micheal Collins wrote in Carrying the fire: after defecation you had to add a small bag with some chemicals and then knead the whole thing to kill of the bacteria (this was done to all poop bags, as far as I know, not only those left on the moon).

Whether any of the bags left on the Moon contained fecal matter is hard to say.

There's an article at Vox.com about this and what we could learn from collecting those bags. The article claims:

Apollo 16 astronaut Charlie Duke spent 71 hours on the moon in 1972. On a recent phone call, he confirmed that the crew left human waste behind.

“We did,” he says. “We left urine that was collected in a tank ... and I believe we had a couple of bowel movements — but I’m not sure — those were in a trash bag. We had a couple of bags of trash we kicked out on the lunar surface.”

In response to this article, Buzz Aldrin wrote on Twitter:

Well, I sure feel bad for whoever finds my bag 💩

But this is no definitive statement that his bags did contain fecal matter.

There is also the NASA Catalogue of Manmade Material on the Moon which, for Apollo 11, lists four Defecation Collection Devices. Looking at the review of spacecraft waste-management systems, it becomes apparent that this is official name for the poop bags. Since this list is very detailed, there probably exist reports for each mission listing these items. It does not list whether these were used or unused.

The SP-368 Biomedical Results of Apollo does list details of samples returned from the missions (there are… interesting tables in there) but doesn't say anything about matter left on the Moon.

In total, it seems 96 bags of poop, urine and puke were left on its surface (couldn't find a definitive source yet, just several articles repeating this claim). Using the poop bags wasn't a nice experience, as Micheal Collins wrote in Carrying the fire: after defecation you had to add a small bag with some chemicals and then knead the whole thing to kill of the bacteria (this was done to all poop bags, as far as I know, not only those left on the moon).

There's an article at Vox.com about this and what we could learn from collecting those bags.

The article claims:

Apollo 16 astronaut Charlie Duke spent 71 hours on the moon in 1972. On a recent phone call, he confirmed that the crew left human waste behind.

In response to this article, Buzz Aldrin wrote on Twitter:

Well, I sure feel bad for whoever finds my bag 💩

But this is no definitive statement that his bags did contain fecal matter.

There is also the NASA Catalogue of Manmade Material on the Moon which, for Apollo 11, lists four Defecation Collection Devices. Looking at the review of spacecraft waste-management systems, it becomes apparent that this is official name for the poop bags. Since this list is very detailed, there probably exist reports for each mission listing these items. It does not list whether these were used or unused.

In total, it seems 96 bags of poop, urine and puke were left on its surface (couldn't find a definitive source yet, just several articles repeating this claim). Using the poop bags wasn't a nice experience, as Micheal Collins wrote in Carrying the fire: after defecation you had to add a small bag with some chemicals and then knead the whole thing to kill of the bacteria (this was done to all poop bags, as far as I know, not only those left on the moon).

There's an article at Vox.com about this and what we could learn from collecting those bags.

The article claims:

Apollo 16 astronaut Charlie Duke spent 71 hours on the moon in 1972. On a recent phone call, he confirmed that the crew left human waste behind.

“We did,” he says. “We left urine that was collected in a tank ... and I believe we had a couple of bowel movements — but I’m not sure — those were in a trash bag. We had a couple of bags of trash we kicked out on the lunar surface.”

In response to this article, Buzz Aldrin wrote on Twitter:

Well, I sure feel bad for whoever finds my bag 💩

But this is no definitive statement that his bags did contain fecal matter.

There is also the NASA Catalogue of Manmade Material on the Moon which, for Apollo 11, lists four Defecation Collection Devices. Looking at the review of spacecraft waste-management systems, it becomes apparent that this is official name for the poop bags. Since this list is very detailed, there probably exist reports for each mission listing these items. It does not list whether these were used or unused.