TABLE 1.

Chemical and biological background data from the raw waters of the drinking water supply system of the Harzwasserwerke Corporation from June 2003

Parameter	Result fora:
	Grane raw water	Ecker raw water	SC Lindenberg
Temp (°C)	7.3	5.9	8.2
pH	7.32	4.88	9.00
HPC (CFU/ml)	75	30	0
Ammonia (mg/liter)	0.032	0.070	0.035
Nitrite (mg/liter)	0.016	0.006	0.009
Nitrate (mg/liter)	5.0	2.7	4.6
Phosphate (mg/liter)	<0.002	<0.002	<0.002
DOC (mg/liter)	2.8	6.5	2.7
Chlorine (mg/liter)	ND	ND	0.03

^aAll data were from 2 June 2003 except for the HPC results, which were from 11 June 2003. ND, not determined.