Ground-Water Information Center Water Quality Report Site Name: EAST GALLATIN AT PENWELL BRIDGE EGPWBR Report Date: 4/24/2024 Compare to Water Quality Standards Location Information Sample Id/Site Id: 2011Q0773 / 258311 Sample Date: 10/28/2010 10:26:00 AM Location (TRS): 01N 05E 29 AC Agency/Sampler: MBMG / SUTHERLAND, MARY K. Latitude/Longitude: 45° 48' 18" N 111° 7' 54" W Field Number: EGPWBR Datum: NAD83 Lab Date: 3/8/2011 Altitude: Lab/Analyst: MBMG / SM County/State: GALLATIN / MT Sample Method/Handling: / 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) 53.800 2.685 Bicarbonate (HCO3) 235.200 3.855 Magnesium (Mg) 15.400 1.267 Carbonate (CO3) 0.000 0.000 Sodium (Na) 12.700 0.552 Chloride (Cl) 12.870 0.363 Potassium (K) 2.880 0.074 Sulfate (SO4) 17.930 0.373 Iron (Fe) <0.002 0.000 Nitrate (as N) 0.979 0.070 Manganese (Mn) 0.003 0.000 Fluoride (F) 0.198 0.010 Silica (SiO2) 12.800 Orthophosphate (as P) <0.1 0.000 Total Cations 4.585 Total Anions 4.672 Trace Element Results (µg/L) Aluminum (Al): <2.0 Cesium (Cs): <0.5 Molybdenum (Mo): 0.925 Strontium (Sr): 214.000 Antimony (Sb): <0.2 Chromium (Cr): <0.2 Nickel (Ni): 0.616 Thallium (Tl): <0.2 Arsenic (As): 2.170 Cobalt (Co): 0.309 Niobium (Nb): <0.5 Thorium (Th): <0.2 Barium (Ba): 61.400 Copper (Cu): 0.702 Neodymium (Nd): <0.2 Tin (Sn): <0.5 Beryllium (Be): <0.2 Gallium (Ga): <0.2 Palladium (Pd): <0.5 Titanium (Ti): 0.332 Boron (B): 19.000 Lanthanum (La): <0.2 Praseodymium (Pr): <0.2 Tungsten (W): <0.2 Bromide (Br): <50 Lead (Pb): <0.2 Rubidium (Rb): 1.730 Uranium (U): 1.720 Cadmium (Cd): <0.2 Lithium (Li): <2.0 Silver (Ag): <0.2 Vanadium (V): 1.520 Cerium (Ce): <0.2 Mercury (Hg): NR Selenium (Se): 0.382 Zinc (Zn): 2.200 Zirconium (Zr): <0.2 Field Chemistry and Other Analytical Results **Total Dissolved Solids (mg/L): 245.97 Field Hardness as CaCO3 (mg/L): NR Ammonia (mg/L): NR **Sum of Diss. Constituents (mg/L): 365.2 Hardness as CaCO3: 197.73 T.P. Hydrocarbons (µg/L): NR Field Conductivity (µmhos): 427 Field Alkalinity as CaCO3 (mg/L): NR PCP (µg/L): NR Lab Conductivity (µmhos): 358 Alkalinity as CaCO3 (mg/L): 192.74 Phosphorus, TD (mg/L): 0.155 Field pH: 8.58 Ryznar Stability Index: 6.728 Field Nitrate (mg/L): NR Lab pH: 8.24 Sodium Adsorption Ratio: 0.4023 Field Dissolved O2 (mg/L): NR Water Temp (°C): 3.8 Langlier Saturation Index: 0.756 Field Chloride (mg/L): NR Air Temp (°C): 3.7 Nitrite (mg/L as N): <0.05 Field Redox (mV): NR Nitrate + Nitrite (mg/L as N) 0.962 P Hydroxide (mg/L as OH): NR 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) 1.24 P 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.