Ground-Water Information Center Water Quality Report Site Name: COWAN CREEK AT DRY CREEK SCHOOL ROAD CCDCSRD Report Date: 4/26/2024 Compare to Water Quality Standards Location Information Sample Id/Site Id: 201639 / 262901 Sample Date: 4/26/2012 2:55:00 PM Location (TRS): 01N 04E 04 CA Agency/Sampler: MBMG / SCOTT, JEFF Latitude/Longitude: 45° 52' 14" N 111° 13' 41" W Field Number: 262901 Datum: NAD83 Lab Date: 7/3/2012 3:04:48 PM Altitude: Lab/Analyst: MBMG / MCGRATH, STEVE County/State: GALLATIN / MT Sample Method/Handling: GRAB / ru:1 ra:0 fu:1 fa:2 Site Type: STREAM Procedure Type: DISSOLVED Geology: Staff Gage Reading: NR USGS 7.5' Quad: BELGRADE Stream Stage: NR PWS Id: Stream Discharge (cfs): NR  -  NR Project: BWIPMN Stream Width (ft): NR  -  NR Sample Water Use: Sample Depth (ft): NR  -  NR Major Ion Results mg/L meq/L mg/L meq/L Calcium (Ca) 54.700 2.730 Bicarbonate (HCO3) 219.230 3.593 Magnesium (Mg) 15.950 1.313 Carbonate (CO3) 5.480 0.196 Sodium (Na) 7.560 0.329 Chloride (Cl) 3.840 0.108 Potassium (K) 2.970 0.076 Sulfate (SO4) 27.520 0.573 Iron (Fe) 0.015 J 0.000 Nitrate (as N) 0.570 0.041 Manganese (Mn) 0.004 J 0.000 Fluoride (F) 0.210 0.011 Silica (SiO2) 18.550 Orthophosphate (as P) <0.020 U 0.000 Total Cations 4.458 Total Anions 4.523 Trace Element Results (µg/L) Aluminum (Al): 27.350 Cesium (Cs): <0.100 U Molybdenum (Mo): 1.050 Strontium (Sr): 300.270 Antimony (Sb): <0.100 U Chromium (Cr): 0.430 J Nickel (Ni): 0.870 Thallium (Tl): <0.100 U Arsenic (As): 1.020 Cobalt (Co): 0.720 Niobium (Nb): <0.100 U Thorium (Th): <0.100 U Barium (Ba): 83.560 Copper (Cu): 2.600 Neodymium (Nd): <0.100 U Tin (Sn): <0.100 U Beryllium (Be): <0.100 U Gallium (Ga): <0.100 U Palladium (Pd): <0.100 U Titanium (Ti): 0.490 J Boron (B): 13.340 Lanthanum (La): <0.100 U Praseodymium (Pr): <0.100 U Tungsten (W): <0.100 U Bromide (Br): <10.000 U Lead (Pb): <0.040 U Rubidium (Rb): 1.850 Uranium (U): 1.770 Cadmium (Cd): <0.100 U Lithium (Li): 3.400 Silver (Ag): <0.100 U Vanadium (V): 2.170 Cerium (Ce): <0.100 U Mercury (Hg): NR Selenium (Se): 0.120 J Zinc (Zn): 0.580 J Zirconium (Zr): <0.100 U Field Chemistry and Other Analytical Results **Total Dissolved Solids (mg/L): 246.56 Field Hardness as CaCO3 (mg/L): NR Ammonia (mg/L): NR **Sum of Diss. Constituents (mg/L): 357.68 Hardness as CaCO3: 202.24 T.P. Hydrocarbons (µg/L): NR Field Conductivity (µmhos): 399 Field Alkalinity as CaCO3 (mg/L): NR PCP (µg/L): NR Lab Conductivity (µmhos): 488.6 Alkalinity as CaCO3 (mg/L): 187.96 Phosphorus, TD (mg/L): <0.030 U Field pH: 8.84 Ryznar Stability Index: 6.476 Field Nitrate (mg/L): NR Lab pH: 8.5 Sodium Adsorption Ratio: 0.2448 Field Dissolved O2 (mg/L): NR Water Temp (°C): 17.3 Langlier Saturation Index: 1.012 Field Chloride (mg/L): NR Air Temp (°C): NR Nitrite (mg/L as N): <0.010 U Field Redox (mV): NR Nitrate + Nitrite (mg/L as N) <0.200 U Hydroxide (mg/L as OH): 0.000 Lab, Dissolved Organic Carbon (mg/L): NR Total Kjeldahl Nitrogen (mg/L as N) NR Lab, Dissolved Inorganic Carbon (mg/L): NR Lab, Total Organic Carbon (mg/L): NR Total Nitrogen (mg/L as N) <1.000 U Acidity to 4.5 (mg/L CaCO3) NR Acidity to 8.3 (mg/L CaCO3) NR As(III) (ug/L) NR As(V) (ug/L) NR Total Susp Solids (mg/L) NR Notes Sample Condition: Field Remarks: Lab Remarks:

Explanation: mg/L = milligrams per Liter; µg/L = micrograms per Liter; ft = feet; NR = No Reading in GWIC Qualifiers: J = Estimated quantity above detection limit but below reporting limit; P = Preserved sample; S = Method of standard additions; U = Undetected quantity below detection limit; * = Duplicate analysis not within control limits; ** = Sum of Dissolved Constituents is the sum of major cations (Na, Ca, K, Mg, Mn, Fe) and anions (HCO3, CO3, SO4, Cl, SiO2, NO3, F) in mg/L. Total Dissolved Solids is reported as equivalent weight of evaporation residue. Disclaimer These data represent the contents of the GWIC databases at the Montana Bureau of Mines and Geology at the time and date of the retrieval. The information is considered unpublished and is subject to correction and review on a daily basis. The Bureau warrants the accurate transmission of the data to the original end user. Retransmission of the data to other users is discouraged and the Bureau claims no responsibility if the material is retransmitted.