Water Quality of Urban Streams: The Allium cepa Seeds/Seedlings Test as a Tool for Surface Water Monitoring

Table 1

Physical and chemical values from different collection sites of urban streams in Santa Cruz do Sul.

	Lajeado stream		Preto stream		Pedras stream		CONAMA
	S1u	S1d	S2u	S2d	S3u	S3d	357/2005—class 1
Temperature (°C)	12	12	13	14	12	13	—
pH	6.85	6.67	6.60	6.82	6.76	6.72	6.00–9.00
EC (µS/cm)	66.5	86.7	51.0	163.3	78.8	105.5	100^1
DO (mg L^−1)	9.8	9.2	9.6	8.2	9.6	8.2	6
Turbidity (NTU)	67.8	66.7	38.2	32.8	59.1	52.9	40

Values established according to CETESB (2005). EC: electric conductivity; DO: dissolved oxygen.