Ground-Water Information Center Water Quality Report Site Name: USGS OBSERVATION WELL - PENWELL BRIDGE RD. 
Report Date: 3/28/2024 Compare to Water Quality Standards

Location Information
Sample Id/Site Id: 203653 / 135735 Sample Date: 4/26/2013 3:20:00 PM
Location (TRS): 01N 04E 25 DCDD Agency/Sampler: MBMG / MCGIVERN, AMBER
Latitude/Longitude: 45° 48' 8" N 111° 9' 54" W Field Number: 135735
Datum: NAD83 Lab Date: 5/22/2013 6:19:10 PM
Altitude: 4389.444 Lab/Analyst: MBMG / MCGRATH, STEVE
County/State: GALLATIN / MT Sample Method/Handling: GRAB / ru:1 ra:0 fu:1 fa:2
Site Type: WELL Procedure Type: DISSOLVED
Geology: 110SNGR, 111SNGR Total Depth (ft): 101
USGS 7.5' Quad: BELGRADE SWL-MP (ft): NR
PWS Id: Depth Water Enters (ft): 10
Project: GWAAMON, GWCP08, NGWMN-MONTANA, 
BWIPMN, GALVAL
Major Ion Results
mg/L meq/L mg/L meq/L
Calcium (Ca) 73.690 3.677 Bicarbonate (HCO3) 269.780 4.422
Magnesium (Mg) 18.680 1.537 Carbonate (CO3) 0.000 0.000
Sodium (Na) 14.100 0.613 Chloride (Cl) 35.750 1.009
Potassium (K) 4.010 0.103 Sulfate (SO4) 25.230 0.526
Iron (Fe) 0.038 J 0.000 Nitrate (as N) 3.520 0.251
Manganese (Mn) <0.002 U 0.000 Fluoride (F) 0.120 0.006
Silica (SiO2) 25.090 Orthophosphate (as P) 0.040 J 0.000
Total Cations 5.938 Total Anions 6.213
Trace Element Results (µg/L)
Aluminum (Al): <0.400 U Cesium (Cs): <0.100 U Molybdenum (Mo): 0.370 J Strontium (Sr): 239.650
Antimony (Sb): <0.100 U Chromium (Cr): <0.100 U Nickel (Ni): 1.220 Thallium (Tl): <0.100 U
Arsenic (As): 0.820 Cobalt (Co): <0.100 U Niobium (Nb): <0.100 U Thorium (Th): <0.100 U
Barium (Ba): 174.090 Copper (Cu): 0.790 J 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): 0.270 J
Boron (B): 29.750 Lanthanum (La): <0.100 U Praseodymium (Pr): <0.100 U Tungsten (W): <0.100 U
Bromide (Br): <10.000 U Lead (Pb): <0.060 U Rubidium (Rb): 1.650 Uranium (U): 1.610
Cadmium (Cd): <0.100 U Lithium (Li): <1.500 U Silver (Ag): <0.100 U Vanadium (V): 1.840
Cerium (Ce): <0.100 U Mercury (Hg): NR Selenium (Se): 0.120 J Zinc (Zn): <0.050 U
Zirconium (Zr): <0.100 U
Field Chemistry and Other Analytical Results
**Total Dissolved Solids (mg/L): 333.37 Field Hardness as CaCO3 (mg/L): NR Ammonia (mg/L): NR
**Sum of Diss. Constituents (mg/L): 470.37 Hardness as CaCO3: 260.89 T.P. Hydrocarbons (µg/L): NR
Field Conductivity (µmhos): 579 Field Alkalinity as CaCO3 (mg/L): NR PCP (µg/L): NR
Lab Conductivity (µmhos): 590.8 Alkalinity as CaCO3 (mg/L): 221.45 Phosphorus, TD (mg/L): 0.070 J
Field pH: 7.66 Ryznar Stability Index: 7.425 Field Nitrate (mg/L): NR
Lab pH: 7.15 Sodium Adsorption Ratio: 0.3772 Field Dissolved O2 (mg/L): NR
Water Temp (°C): 11.8 Langlier Saturation Index: -0.137 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) 3.080 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) 3.210 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.