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 2. Statistical summary of selected ground-water data for the Fraser River watershed, 1998-2001, with U.S. Environmental Protection Agency and State of Colorado water-
quality standards and U.S. Geological Survey National Water Quality Laboratory reporting levels.
[All water-quality constituents are in the dissolved form except for total coliform bacteria, methylene blue active substances, and radon-222. USEPA, U.S. Environmental Protection Agency;
USEPA water-quality
standards and health advisory are from U.S. Environmental Protection Agency (2002b) unless otherwise noted; WY, water year; MRL, minimum reporting level; LT-MDL, long-term method detection
level; LRL,
laboratory reporting level; °C, degrees Celsius; --, no standard determined; µS/cm, microsiemens per centimeter at 25 degrees Celsius; mg/L, milligrams per liter; SDWR, USEPA secondary
drinking-water regu-
lation; NTU, nephelometric turbidity units; TT, treatment techniques; WQS, water-quality standard; <, less than; µg/L, micrograms per liter; E, estimated; N, nitrogen; HA, health advisory;
MCL, maximum
contaminant level; nitrate is nitrate plus nitrite; P, phosphorus; C, carbon; col/100 mL, colonies per 100 milliliters; MCLG, maximum contaminant level goal; pCi/L, picocuries per liter;
AMCL, alternative
maximum contaminant level]
Field properties, Number USEPA WY 1998 WY 1999 WY 2000 WY 2001
constituents, and of Minimum Median Maximum water-quality
reporting units samples standard or health MRL LT-MDL *LRL LTMDL * LRL LT-MDL * LRL
advisory (=MRL? (=MRL) (-MRL)
Water temperature 70 4.0 7.3
(°C)
Specific conductance 70 88 260
(µS/cm)
Oxygen, dissolved 70 0.1 3.8
(mg/-)
pH (standard units) 70 6.1 7.6
Turbidity (NTU) 69 0.1 0.3
Dissolved solids 67 55 165
(mg/-)
Chloride (mg/L) 70 0.3 2.6
Sulfate (mg/L) 67 <0.3 2.9
Iron (ltg/L) 70 <10 <10
Manganese (ltg/L) 70 E 2.0 <3.2
Ammonia,4 as N 70 <0.002 <0.002
(mg/L)
Nitrite, as N (mg/L) 69 <0.001 <0.001
Nitrate, as N (mg/L) 70 <0.005 0.208
Orthophosphate, as P 70 E 0.005 0.047
(mg/L)
Dissolved organic 70 0.2 0.91
carbon, as C (mg/ )
Field properties
15.0 - 0.1
430 -- 1.0
10.1 -- 0.1
8.5 6.5-8.5 (SDWR) 0.1
7.7 15.0 (TT) 1.0
Dis solved solids, major ions, and trace elements
269 2400 mg/L or 1.25 times Computed concentration3
background level
(WQS)
24.7 250 (SDWR) 0.1
16.0 250 (SDWR) 0.1
310 300 (SDWR) 10 5
510 50 (SDWR) 4 1.5
Nutrients and dissolved org anic carbon
0.040 30 (HA) 0.002
0.004 1 (MCL) 0.001
4.72 10 (MCL) 0.005
0.137 -- 0.001
4.0 0.1
*0.1 *0.1 *0.1
*1.0 *1.0 *1.0
*0.1 *0.1 X0.1
*0.1 *0.1 *0.1
*1.0 *1.0 *1.0
*0.1 0.14 0.29 0.04 0.08
*0.1 0.15 0.31 0.05 0.11
10 5 10 5 10
3 1.1 2.2 1.6 3.2
*0.002 *0.002 *0.002
*0.001 *0.001 *0.001
*0.005 *0.005 *0.005
*0.001 *0.001 0.004 0.007
*0.1 0.16 0.33 0.16 0.33
0