9624 ‎(2)‎

• UCREFRP Catalog Number: 9624
• Author: Bauch, N. J. and J. B. Bails.
• Title: Water-Quality Characteristics and Ground-Water Quantity of the Fraser River Watershed, Grand County, Colorado 1998-2001.
• USFW Year: 2004.
• USFW - Doc Type: \
• Copyright Material: NO

Table 4. Statistical summary of selected field properties and water-quality constituents for surface water at the Fraser River below Crooked Creek at Tabernash, Colorado, 1998-
2001.
[All water-quality constituents are in the dissolved form except for total phosphorus, particulate organic carbon, and fecal coliform bacteria. Water-quality standards are from Colorado
Department of Public Health
and Environment (2002). WY, water year; MRL, minimum reporting level; LT-MDL, long-term method detection level; LRL, laboratory reporting level; ft3/s, cubic feet per second; --, no
standard established;
mg/L, milligrams per liter; gS/cm, microsiemens per centimeter at 25 degrees Celsius; gg/L, micrograms per liter; N, nitrogen; <, less than; nitrate is nitrate plus nitrite; P, phosphorus;
C, carbon; col/100 mL,
colonies per 100 milliliters; E, estimated]
Field properties, Number State of Colorado 1998 WY 1999 WY 2000 WY 2001
constituents, and of Minimum Median Maximum water-quality
reporting units samples standard MRL LTMDL
M LTMDL M LTMDL
(*
RL) (,
RL) (* MRL)
Field properties and suspended sediment
Discharge (ft3/s) 24 31.0 66.2 244 --
Suspended sediment (mg/L) 16 3 8 29 -
Specific conductance (gS/cm) 23 74 108 146 - 1.0 * 1.0 * 1.0 *1.0
Oxygen, dissolved (mg/L) 24 8.0 9.6 11.5 16.0, 7.0 0.1 *0.1 *0.1 *0.1
pH (standard units) 24 7.8 8.3 8.6 6.5-9.0 0.1 *0.1 *0.1 *0.1
Dissolved solids, major ions, and trac e elements
Dissolved solids (mg/L) 17 53 70 93 -- Computed concentration2
Chloride (mg/L) 24 2.2 3.9 9.0 250 0.1 *0.1 0.14 0.29 0.04 0.08
Sulfate (mg/L) 19 1.1 2.7 4.5 250 0.1 *0.1 0.15 0.31 0.05 0.11
Iron (gg/L) 19 73 198 354 300 (chronic) 10 5 10 5 10 5 10
Manganese (gg/L) 19 14 26 53 50 (chronic) 4 1.5 3 1.1 2.2 1.6 3.2
Nutrients and organic carbon
Ammonia,3 as N (mg/L) 24 <0.002 0.015 0.412 -- 0.002 *0.002 *0.002 *0.002
Un-ionized ammonia,4 as N 24 2.6x10-5 7.4x10-5 0.004 0.02 (chronic) Computed conce ntration4
(mg/-)
Nitrite, as N (mg/L) 24 0.001 0.005 0.01 0.05 0.001 *0.001 *0.001 *0.001
Nitrate, as N (mg/L) 24 0.012 0.062 0.703 10 0.005 *0.005 *0.005 *0.005
Total phosphorus, as P (mg/L) 24 0.032 0.058 0.173 -- 0.004 *0.004 0.003 0.006 0.003 0.006
Phosphorus, as P (mg/L) 24 0.015 0.030 0.084 - 0.004 *0.004 0.003 0.006 0.003 0.006
Orthophosphate, as P (mg/L) 24 0.011 0.024 0.077 - 0.001 *0.001 *0.001 0.004 0.007
Dissolved organic carbon, as C 19 1.6 3.3 6.3 -- 0.1 *0.1 0.16 0.33 0.16 0.33
(mg/-)
Particulate organic carbon, as 18 <0.2 0.3 0.7 -
C (mg/L)
Fecal coliform bacteria
Fecal coliform bacteria 23 <1 E 7 129 200 1 *1 *1 *1
(col/100 mL) (geometric mean)
Water-quality standard is a minimum of 6.0 mg/L except during periods of fish spawning when it is a minimum of 7.0 mg/L.
2Dissolved solids (sum of constituents) is computed as the sum of calcium, magnesium, sodium, potassium, silica, chloride, sulfate, and carbon (as carbonate equivalent) plus any other
constituents, such as
dissolved iron, if they are present in the water.
3Un-ionized ammonia [NH3] plus ammonium [NH4+].
4NH3.
N
0