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Training and Test
for Surface Cleaners
and Pressure Washers

City of Boulder Specific Pollutant Limitations

Metals Daily Maximum (mg/l)
Arsenic 0.10
Cadmium 0.10
Chromium VI (grab sample only) 0.42
Chromium Total 5.25
Copper 1.2
Lead 0.7
Mercury 0.0007
Molybdenum 0.009
Nickel 0.65
Selenium 0.16
Silver 0.10
Zinc 5.4

Parameter (grab sample only) Standard Units
pH Minimum = 5.5, Maximum = 10.5