Table 1.

Total wastewater flow entering the WWTP and total loads of measured plus average estimated loss during storage for creatinine, caffeine, methamphetamine, benzoylecgonine (BZE), and cocaine, and normalized load (load substance/load creatinine) for each sampling day starting at 8 am.

Substance	Wednesday	Thursday	Friday	Saturday
Total wastewater flow
(L)	3.82×107	3.65×107	3.48×107	3.18×107
Creatinine
(kg)	36	27	22	19
Caffeine
(g)	1600	1600	1500	1400
normalized	0.05	0.06	0.07	0.08
Methamphetamine
(g)	11	11	13	13
normalized	3.1×10−4	4.1 × 10−4	5.9 × 10−4	6.8 × 10−4
BZE
(g)	2.4	2.2	1.9	2.1
normalized	6.7 ×10−5	8.1 ×10−5	8.6 ×10−5	1.1 ×10−4
Cocaine
(g)	0.15	0.33	0.23	0.21
normalized	4.2 ×10−6	1.2 ×10−5	1.0 ×10−5	1.1 ×10−5