Table 2.

Significance test results for difference between EDQPI 1 and EDQPI 2. %pop: % of the population of the urban unit connected to the WWTP; #P: Number of WWTPs that treat the main city; Cities: Number of cities connected to the WWTP; Ratio: ratio between the population of the main city over the sum of the populations connected to the WWTP; Lab: Index of the laboratory responsible for the analyses; Samples per week: number of samples collected per week, on average.

WWTP	Catchment population	%pop	#P	Cities	Ratio	Lab	Samples per week	p-value
Forges-les-eaux	16 000	100	1	3	0.73	1	1	<0.0001
Fécamp	45 000	100	1	4	0.85	1	1	<0.0001
Saint-Denis lès Sens	64 000	100	2	7	0.67	1	2	<0.0001
Auxerre-Appoigny	83 000	100	1	5	0.78	1	2	<0.0001
Nantes-2-Petite Californie	180 000	27	2	8	0.70	2	2	<0.0001
Evry	220 000	100	1	16	0.31	2	2	<0.0001
Lyon-La Feyssine	300 000	11	6	65	0.57	2	2	<0.0001
Le Havre	320 000	100	1	20	0.72	1	1	<0.0001
Lagny-sur-Marne	350 000	100	1	26	0.10	1	2	0.0017
Dijon	400 000	96	1	18	0.68	2	2	<0.0001
Lille Grimonpont	420 000	28	2	14	0.39	2	2	<0.0001
Reims	470 000	100	1	18	0.82	1	7	<0.0001
Nancy-Maxeville	500 000	100	1	23	0.38	2	2	<0.0001
Rouen	550 000	78	1	35	0.30	1	1	0.488
Paris Marne Aval	550 000	5	3	16	0.24	1	2	<0.0001
Nantes-1-Tougas	600 000	74	2	12	0.62	2	2	<0.0001
Nice-Haliotis	620 000	57	1	18	0.85	2	2	<0.0001
Lyon-Pierre Bénite	630 000	38	6	65	0.57	2	2	<0.0001
Toulouse-Ginestous	950 000	70	15	27	0.77	2	2	0.034
Lyon-Saint-Fons	980 000	47	6	65	0.57	2	2	<0.0001
Strasbourg	1 000 000	100	1	28	0.58	2	2	0.0012
Paris Seine Amont	3 600 000	33	3	125	0.24	1	2	<0.0001