Ground-Water Information Center Water Quality Report Site Name: CITY OF MANHATTAN  Report Date: 4/25/2024 Compare to Water Quality Standards Location Information Sample Id/Site Id: 2009Q0573 / 9367 Sample Date: 4/23/2009 Location (TRS): 01N 03E 10 ABBA Agency/Sampler: MBMG / GITC Latitude/Longitude: 45° 51' 35" N 111° 20' 3" W Field Number: GLWQD-123 Datum: NAD83 Lab Date: 5/29/2009 Altitude: 4238 Lab/Analyst: MBMG / SM County/State: GALLATIN / MT Sample Method/Handling: GRAB / 6000 Site Type: WELL Procedure Type: DISSOLVED Geology: 120SDMS Total Depth (ft): 253 USGS 7.5' Quad: MANHATTAN 7 1/2 SWL-MP (ft): NR PWS Id: 00285003 Depth Water Enters (ft): 75 Project: RADON, PWSINV, GWCP08 Major Ion Results mg/L meq/L mg/L meq/L Calcium (Ca) 69.800 3.483 Bicarbonate (HCO3) 275.700 4.519 Magnesium (Mg) 20.300 1.670 Carbonate (CO3) 0.000 0.000 Sodium (Na) 33.100 1.440 Chloride (Cl) 12.200 0.344 Potassium (K) 6.260 0.160 Sulfate (SO4) 86.600 1.804 Iron (Fe) <0.043 0.000 Nitrate (as N) 1.21 P 0.086 Manganese (Mn) <0.031 0.000 Fluoride (F) <0.5 0.000 Silica (SiO2) 32.800 Orthophosphate (as P) <0.5 0.000 Total Cations 6.767 Total Anions 6.753 Trace Element Results (µg/L) Aluminum (Al): <38.20 Cesium (Cs): <0.21 Molybdenum (Mo): 1.230 Strontium (Sr): 350.000 Antimony (Sb): <0.24 Chromium (Cr): <0.20 Nickel (Ni): <0.57 Thallium (Tl): <0.17 Arsenic (As): 1.970 Cobalt (Co): <0.29 Niobium (Nb): <0.22 Thorium (Th): <0.12 Barium (Ba): 33.000 Copper (Cu): <1.99 Neodymium (Nd): <0.26 Tin (Sn): <0.21 Beryllium (Be): <0.91 Gallium (Ga): <0.23 Palladium (Pd): <0.32 Titanium (Ti): <0.96 Boron (B): 62.900 Lanthanum (La): <0.11 Praseodymium (Pr): <0.11 Tungsten (W): <0.25 Bromide (Br): <500 Lead (Pb): <0.77 Rubidium (Rb): 7.280 Uranium (U): 6.980 Cadmium (Cd): <0.24 Lithium (Li): 9.220 Silver (Ag): <0.21 Vanadium (V): 3.760 Cerium (Ce): <0.10 Mercury (Hg): NR Selenium (Se): 1.340 Zinc (Zn): <4.71 Zirconium (Zr): <0.24 Field Chemistry and Other Analytical Results **Total Dissolved Solids (mg/L): 397.06 Field Hardness as CaCO3 (mg/L): NR Ammonia (mg/L): NR **Sum of Diss. Constituents (mg/L): 537.1 Hardness as CaCO3: 257.85 T.P. Hydrocarbons (µg/L): NR Field Conductivity (µmhos): NR Field Alkalinity as CaCO3 (mg/L): NR PCP (µg/L): NR Lab Conductivity (µmhos): 618 Alkalinity as CaCO3 (mg/L): 226.37 Phosphorus, TD (mg/L): <0.030 Field pH: NR Ryznar Stability Index: 6.583 Field Nitrate (mg/L): NR Lab pH: 8.02 Sodium Adsorption Ratio: 0.8943 Field Dissolved O2 (mg/L): NR Water Temp (°C): NR Langlier Saturation Index: 0.719 Field Chloride (mg/L): NR Air Temp (°C): NR Nitrite (mg/L as N): NR Field Redox (mV): NR Nitrate + Nitrite (mg/L as N) NR Hydroxide (mg/L as OH): NR Lab, Dissolved Organic Carbon (mg/L): 0.940 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) NR 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.