Plant overview
Latest entry: Fri Nov 6, 2026 (3 days ago)
Alarms
HIGH 0WARNING 2DATA 0WARNINGAB4SVI 188 mL/g is over the 150 bulking watch line.
WARNINGClarifier 4Blanket 2.9 → 3.9 ft, rising 3 entries in a row.
Thresholds are starting points, kept together in alarms.py. SRT alarms need
2–3 entries in a row, so one odd sample doesn't raise one.
Solids inventory
43,839 lbs
Basins plus clarifier blankets
Wasted
3,927 lbs/day
From yesterday's WAS flows
Total to waste
33,509 gal/day
Recommended, all clarifiers
On target, 30 days
AB3 13/19 · AB4 11/19
Entries within ±20% of target SRT
Basins and clarifiers
Shaded band: target SRT ±20%. Grey is normal; colour marks what needs attention.
AB2Out of service · last in service Mon Apr 20, 2026
AB3Aeration basin · 1.00 MG
Trends
SRT
11.2 days
target 12 · -6% vs target
012 d24 d
MLSS
2,530mg/L
SSV30
270mL/L
SVI
107mL/g
Basin solids
21,100lbs
Clarifier 3 · 16 ft
Blanket
0.5 ft
dashed line: 4 ft alarm level
RAS 3
8,530WAS 3
12,060mg/L · blanket solids 734 lbs
WAS 3 tomorrow
0.0181 MGD
Pump timer 24 s
Yesterday 0.0193 MGD · -6%
AB4Aeration basin · 1.00 MG
Trends
SRT
11.1 days
target 12 · -8% vs target
012 d24 d
MLSS
2,180mg/L
SSV30
410mL/L
SVI
188mL/g
Basin solids
18,181lbs
Clarifier 4 · 16 ft
Blanket
3.9 ft
dashed line: 4 ft alarm level
RAS 4
5,700WAS 4
14,260mg/L · blanket solids 3,824 lbs
WAS 4 tomorrow
0.0154 MGD
Pump timer 28 s
Yesterday 0.0167 MGD · -8%