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ENV HLT 110 · Lec 1

Indoor and Outdoor Air Quality: Science, Tools, and Policy

Fall 2026Zhu, Y.4 units

Seats, time, final and grades

Seats

Open, 34 seats left.

6 of 40 enrolled, lecture and all discussions summed.

Read 5 hours ago. The latest refresh is overdue. Seats and instructors may have changed since. Check the registrar before enrolling.

Meets

MW 2:00pm-3:50pm

Lecture only. You also attend a discussion, listed below.

Final

Tue 8 Dec, 3:00pm to 6:00pm

One exam for the whole class, Los Angeles time.

Read 2 days ago.

Grades

no grade history

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When you can enroll

Set your appointment or acknowledge that an open seat may not be available to you yet.

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A watch slot

25 per account. A lecture watch also covers its discussions. Paused watches still use a slot.

25 free watches

Before you can enroll

Registrar's Restrictions cell, read 2 days ago: "Juniors and Seniors Only".

Restrictions checked 2 days ago and may be outdated. Unwatched sections are rechecked less often than watched sections. Check the registrar before counting on a seat.

Discussions

You enroll in the discussion, not the lecture, so the seat figure above is the sum across all of them and can read open while every discussion you could actually join is full.

1 discussion, all open.

  • Dis 1A

    T 4:00pm-4:50pm

    Derouen, T.

    Open, 34 seats left.

When it meets

Discussion alternatives are shown with the lecture; choose one linked discussion.

Mon
Tue
Wed
Thu
Fri
2pm
3pm
4pm

Lec 1

2pm-3:50pm

Dis 1A

4pm-4:50pm

Lec 1

2pm-3:50pm

Scroll sideways for the whole week. All meeting times are listed below.

  • Lec 1

    MW 2:00pm-3:50pm

  • Dis 1A (alternative)

    T 4:00pm-4:50pm

Royce Hall 162

Grades

no grade history

More about ENV HLT 110, though its grade history is empty too.

What students say

dibs measures outcomes: grades, seats, how fast it fills. For what the class is actually like to sit in, BruinWalk has the reviews.

No reviews were listed in the BruinWalk source checked 6 days ago. Assignment details are unknown. Check the current syllabus.

Will it still be here

low risk chance of closing before your enrollment pass.

Seats over time

Nothing read since 16 Oct, 5 hours ago. Over about 2 months before that, freed 1 seat.

6 of 40 · 34 left in its discussions
18 Aug 21:4017 Sep 07:2116 Oct 17:02 · 5 hours ago
Checked 168 of the 654 hours with hourly history, 26%. No reading was recorded in 486 hours. dibs had no hourly record before 19 Sep, which is the other 759 of 1413 plotted.6 of 40 enrolled at the newest reading, 5 hours ago, with 34 left in its discussions. Seats from 18 Aug 21:40 to 16 Oct 17:02, 7 to 6. Checks are not continuous monitoring. Changes between checks may be missed.

A dot is a reading where something moved: the seat count, the status, or the waitlist. Flat between dots joins recorded counts; changes between reads may be missed. The line starts when dibs first saw this section rather than reaching back before it existed. The last one is the last time dibs read this section, moved or not, and that was 5 hours ago. It is where the line stops, not where the count is now.

Show the readings (28)
Recorded Enrolled Capacity Status Waitlist Hours read
16 Oct 17:02 6 40 open 0 of 5 64 of 246
6 Oct 12:42 6 40 open 0 of 5 4 of 12
6 Oct 01:12 7 40 open 0 of 5 3 of 9
5 Oct 17:02 9 40 open 0 of 5 2 of 5
5 Oct 13:42 8 40 open 0 of 5 20 of 94
1 Oct 16:12 9 40 open 0 of 5 17 of 63
29 Sep 02:42 8 40 open 0 of 5 3 of 8
28 Sep 19:42 10 40 open 0 of 5 3 of 8
28 Sep 12:42 9 40 open 0 of 5 4 of 12
28 Sep 01:12 10 40 open 0 of 5 18 of 62
25 Sep 12:22 11 40 open 0 of 5 6 of 19
24 Sep 18:12 10 40 open 0 of 5 3 of 9
24 Sep 10:22 11 40 open 0 of 5 10 of 36
22 Sep 23:52 12 40 open 0 of 5 7 of 22
22 Sep 02:22 13 40 open 0 of 5 18 of 161, 98 no hourly record
15 Sep 10:52 12 40 open 0 of 5 no hourly record
28 Aug 01:40 13 40 open 0 of 5 no hourly record
27 Aug 22:40 12 40 open 0 of 5 no hourly record
27 Aug 21:40 13 40 open 0 of 5 no hourly record
27 Aug 20:40 12 40 open 0 of 5 no hourly record
27 Aug 19:40 13 40 open 0 of 5 no hourly record
27 Aug 11:28 12 40 open 0 of 5 no hourly record
25 Aug 22:40 11 40 open 0 of 5 no hourly record
24 Aug 23:40 9 40 open 0 of 5 no hourly record
21 Aug 15:40 10 40 open 0 of 5 no hourly record
21 Aug 01:40 9 40 open 0 of 5 no hourly record
19 Aug 16:40 8 40 open 0 of 5 no hourly record
18 Aug 21:40 7 40 open 0 of 5 -
How readings and alerts work

Dated seat counts can be available even when hourly check history is missing. Gaps do not show whether seats changed between observations.

Seat counts show the last successful read, not live availability. Refreshes can be delayed by request limits or upstream interruptions. Watched sections receive priority, but an hourly update for every section is not guaranteed.

The registrar can change a seat count between our checks. Alerts depend on dibs detecting an opening and completing delivery; a quiet watch does not prove that no seat opened. Check the registrar before enrolling.

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