introduction

njwrri.rutgers.edu

introduction

Bureau of Water Quality Standards &Assessment•Produce the “New Jersey IntegratedWater Quality Monitoring andAssessment Report. ”-Fulfills Section 305(b) and 303(d)requirements under the CWA.-In context of this reporting - do useDiurnal Data.


Diurnal DO Data is Valuable to AssessmentProcess• 1. SWQS have minimal DO requirementsdepending upon classification.• For example - Trout Maintenance waters: A 24 hour avg of notless than 6.0 mg/l. Not less that = 5.0 mg/l at any timeThe period of concern for DO is when it is at it’slowest in a 24 hr period = early morning.• 2. In context of Nutrient Impact Assessment:• Looking for DO swing within 24 hour cycle of< or > 3mg/l.


Temperature Data:• Concern is when temperatures are at theirhighest - best captured by continuousrecordings.• Captures 24 hour cycle including the daytimeperiods of greatest concern over an extendedperiod of time.• Current criteria are expressed as SummerSeasonal Average.• Proposed criteria (FW Waters) will be 7-Day Avgof the Daily Maximum plus a not-to-exceedvalue.

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