...monitoring equipment being returned for budgetry reasons?
Hard to believe, isn't it?

Maybe the equipment's been stolen and up for sale somewhere.

Not one for joining conspiracy theories, (as a rule), that there is no "official" monitoring of air quality in Bali any more does beg the question of why?

It seems clear to me that various independent reports of air quality in Bali (particularly Denpasar and Ubung), show a very bleak picture.
If the local authorities are trying to hide this, I believe their actions are reprehensible.

A couple of days ago I wanted to get hold of some "official" data concerning Bali.

I thought the Bali Tourism Board (in Jalan Raya Puputan, Renon), might be a start. No - they told me to go to the Bali Government Tourist Board, (just around the corner in a much bigger building).
They have information in book-form and/or a CD-ROM. about tourism in Bali. Fair enough, (although I wondered to myself why they need two offices in close proximity of each other).
For the information I was after, they suggested the Bali Statistics Office (BPS), also in Jalan Raya Puputan, but further down the road towards Sanur (right near the junction with Jalan Hayam Wuruk).

Another large building, plunged in darkness (the electricity was off). The staff were helpful. That office has many publications available, (I didn't look specifically for ones related to air quality).

The one I wanted is called Bali Dalam Angka 2011, (Bali in Figures), which they had in two versions: a book with 546 pages (Rp 160,000), and a high-quality photocopy of the same book (Rp 85,000). I opted for the latter.
Most of the figures, tables, information, etc, are in both Indonesian and English. The data has been collected from various government departments and is "accurate" until 2010.

I've only had time to look through the stuff briefly, so far. I think I've spotted several discrepancies, here and there, but that doesn't surprise me.
A few pages are "missing" - don't know if intentionally, or because whoever photocopied it was too tired, bored, or both.

I don't need a book filled with statistics to tell me that Bali is extremely environmentally challenged these days. (I've been living here for about 16 years.)
Last year, about 65% of Bali's population live in "urban areas". I think Bali's rate of population growth is the second highest in all of Indonesia.

Until and when the authorities and people realistically address the issues facing them, this tiny beautiful island faces a looming disaster.