Water Quality Parameter Properly Functioning Conditions Notes Reference
Ammonia 15 ug/La, 130 ug/Lb Criteria for protection of aquatic life depend on pH, temperature, and presence of salmonids. Criteria given are in terms of total ammonia based on the following assumptions: pH 7.5, temperature = 15 oC, and salmonids present. OAR 340-41-0445
Arsenic* 360 ug/La, 190 ug/Lb, 2.2 ng/Lc, 17.5 ng/Ld, 0.05 mg/Le Criteria listed for protection of aquatic life are for trivalent arsenic. OAR 340-41-445(2)(p): Table 20: Water Quality Criteria Summary
 
For water and fish ingestion and fish consumption criteria, a 10-6 risk level human health criteria are presented.  This risk level indicates the probability of one concern case per million people at the stated concentration.
Cadmium* 1.8 ug/La, 0.66 ug/Lb, 10 ug/Lc, 0.010 mg/Le Criteria for protection of aquatic life are hardness dependent (50 mg/L hardness used). OAR 340-41-445(2)(p): Table 20: Water Quality Criteria Summary
Chemical contamination/ nutrients Low levels of chemical contamination from agriculture, industrial activities, and other sources, no excess nutrients, no CWA 303d designated reaches At risk: moderate levels of chemical contamination from agriculture, industrial activities, and other sources, some excess nutrients, one CWA 303d designated reach NMFS, 1996
   
(This is a general description. Specific listings are given in the table for each study parameter.) Not properly functioning: high levels of chemical contamination from agriculture, industrial activities, and other sources, high levels of excess nutrients, more than one CWA 303d designated reach
Chromium (hexavalent)* 16 ug/La, 11 ug/Lb, 50 ug/Lc, 0.05 mg/Le   OAR 340-41-445(2)(p): Table 20: Water Quality Criteria Summary
Copper* 9.2 ug/La, 6.5 ug/Lb Criteria for protection of aquatic life are hardness dependent (50 mg/L hardness used). OAR 340-41-445(2)(p): Table 20: Water Quality Criteria Summary
Dissolved Oxygen 30-day mean minimum:  6.5 mg/Lf,   OAR 340-41-445(2)(a): Table 21: Dissolved Oxygen & Intergravel Dissolved Oxygen Criteria
7-day minimum mean:  5.0 mg/Lf,
Absolute minimum for surface samples: 4.0 mg/Lf
Lead* 34 ug/La, 1.3 ug/Lb, 50 ug/Lc, 0.05 mg/Le Criteria for protection of aquatic life are hardness dependent (50 mg/L hardness used). OAR 340-41-445(2)(p): Table 20: Water Quality Criteria Summary
Nitrates 10. mg/Lc,e   OAR 340-41-445(2)(p): Table 20: Water Quality Criteria Summary
Nutrients Qualitative – limits are typically established through TMDL process: meets assimilative capacity or in absence of these, concentrations do not produce   City of Portland, 2002
consistent algal blooms above the chlorophyll a target (<15 ug/L OAR 341-041-0150(1)(c)) or dissolved oxygen concentrations below the dissolved oxygen targets (see dissolved oxygen criteria)
pH 6.5 – 8.5 Some exceptions exist for waters impounded by dams. OAR 340-041-0045(2)(d)
Sediment/ turbidity >12% fines (>0.85mm) in gravel, turbidity low At risk: 12-17% fines in gravel NMFS, 1996
Not functioning properly: >17% fines in gravel
Total phosphorus No numeric water quality criteria exist.   ODEQ, 2001
 
Tribs: 0.04 to 0.19 mg/L median summer concentrations (Tualatin River Subbasin load allocations for background tributary, ODEQ, 2001)
Total suspended solids No numeric water quality criteria exist. The Utah water quality standards state that “investigations should be conducted to develop more information where these levels are exceeded” regarding the TSS criteria for protection of aquatic life. Therefore, these values should be used as reference values only and concentrations exceeding them should not be considered immediately harmful to aquatic life. State of Utah R317-2-14. Standards of Quality for Waters of the State, Numeric Criteria. Table 34.1.
 
90 mg/L is the TSS criterion for the protection of the beneficial uses of recreation, aesthetics, and warm water aquatic life and is used here as a reference value. Utah also has a criterion of 35 mg/L TSS for the protection of cold water aquatic life. See notes.
Zinc* 65 ug/La, 59 ug/Lb Criteria for protection of aquatic life are hardness dependent (50 mg/L hardness used). OAR 340-41-445(2)(p): Table 20: Water Quality Criteria Summary
303(d)-listed parameters Meets state water quality criteria as appropriate to each parameter:   NMFS, 1996
    Aldrin 3.0 ug/La, 0.074 ng/Lc, 0.079 ng/Ld For water and fish ingestion and fish consumption criteria, a 10-6 risk level human health criteria are presented.  This risk level indicates the probability of one concern case per million people at the stated concentration. OAR 340-41-445(2)(p): Table 20: Water Quality Criteria Summary
    DDT 1.1 ug/La, 0.001 ug/Lb, 0.024 ng/Lc,d For water and fish ingestion and fish consumption criteria, a 10-6 risk level human health criteria are presented.  This risk level indicates the probability of one concern case per million people at the stated concentration. OAR 340-41-445(2)(p): Table 20: Water Quality Criteria Summary
    Dieldrin 2.5 ug/La, 0.0019 ug/Lb, 0.071 ng/Lc, 0.076 ng/Ld For water and fish ingestion and fish consumption criteria, a 10-6 risk level human health criteria are presented.  This risk level indicates the probability of one concern case per million people at the stated concentration. OAR 340-41-445(2)(p): Table 20: Water Quality Criteria Summary
     E. coli 30-day log mean of 126 E. coli organisms per 100 ml, based on a minimum of five samples, no single sample should exceed 406 E. coli organisms per 100 ml   OAR 340-041-0045(2)(e)
    Fecal coliform   No fresh water aquatic life or human health criteria. See E. coli for applicable bacteria criteria. OAR 340-041-0045(2)(e)
    Iron* 1,000 ug/Lb, 0.3 mg/Lc   OAR 340-41-445(2)(p): Table 20: Water Quality Criteria Summary
    Manganese* 50 ug/Lc, 100 ug/Ld   OAR 340-41-445(2)(p): Table 20: Water Quality Criteria Summary
    Mercury* 2.4 ug/La, 0.012 ug/Lb, 144 ng/Lc, 146 ng/Ld,   OAR 340-41-445(2)(p): Table 20: Water Quality Criteria Summary
0.002 mg/Le
    PAHs 2.8 ng/Lc, 31.1 ng/Ld For water and fish ingestion and fish consumption criteria, a 10-6 risk level human health criteria are presented.  This risk level indicates the probability of one concern case per million people at the stated concentration. OAR 340-41-445(2)(p): Table 20: Water Quality Criteria Summary
    PCB 2.0 ug/La, 0.014 ug/Lb, 0.079 ng/Lc,d For water and fish ingestion and fish consumption criteria, a 10-6 risk level human health criteria are presented.  This risk level indicates the probability of one concern case per million people at the stated concentration. OAR 340-41-445(2)(p): Table 20: Water Quality Criteria Summary
Pentachlorophenol 20. ug/La, 13. ug/Lb, 1.01 mg/Lc Aquatic life criteria are pH dependent (pH 7.8 used). OAR 340-41-445(2)(p): Table 20: Water Quality Criteria Summary
Temperature Tribs: 7-day average of maximum daily temperature below 64 oF (17.8oC) for protection of fish rearing   OAR 340-041-0045(2)(b)
Tribs: 7-day average of maximum daily temperature below 55 oF (12.8oC) during spawning and incubation of salmonids
Willamette: 7-day average of maximum daily temperature below 68 oF (20oC)
Temperature 50-57oF At risk: 57-60oF (spawning), NMFS, 1996
57-64 oF (migration and rearing)
Not properly functioning: >60 oF (spawning), >64 oF (migration and rearing)
*Note metals criteria for the State of Oregon are in terms of total metals. No criteria exist for dissolved metals in Oregon.
a acute criteria for protection of aquatic life
b chronic criteria for protection of aquatic life
c water and fish ingestion criteria
d fish consumption only criteria
e drinking water Maximum Contaminant Level (MCL)
 f cool water criteria