Ground-Water Information Center Water Quality Report Site Name: TOWN OF MANHATTAN PWS, WELL #1 (HORIZONTAL WELL, DEVELOPED SPRING)  Report Date: 4/24/2024 Compare to Water Quality Standards Location Information Sample Id/Site Id: 2009Q0574 / 251512 Sample Date: 4/23/2009 Location (TRS): 01N 03E 14 BBCB Agency/Sampler: MBMG / GI Latitude/Longitude: 45° 50' 35" N 111° 19' 34" W Field Number: GLWQD-124 Datum: NAD83 Lab Date: 5/29/2009 Altitude: 4270 Lab/Analyst: MBMG / SM County/State: GALLATIN / MT Sample Method/Handling: PUMPED / Site Type: SPRING Procedure Type: DISSOLVED Geology: 111SNGR Total Depth (ft): NR USGS 7.5' Quad: MANHATTAN SWL-MP (ft): NR PWS Id: Depth Water Enters (ft): NR Project: GLWQDPHARM, GWCP08 Major Ion Results mg/L meq/L mg/L meq/L Calcium (Ca) 55.100 2.749 Bicarbonate (HCO3) 225.900 3.703 Magnesium (Mg) 17.600 1.448 Carbonate (CO3) 0.000 0.000 Sodium (Na) 9.300 0.405 Chloride (Cl) 5.960 0.168 Potassium (K) 3.490 0.089 Sulfate (SO4) 28.780 0.599 Iron (Fe) <0.043 0.000 Nitrate (as N) 2.17 P 0.155 Manganese (Mn) <0.031 0.000 Fluoride (F) 0.218 0.011 Silica (SiO2) 18.900 Orthophosphate (as P) <0.05 0.000 Total Cations 4.704 Total Anions 4.637 Trace Element Results (µg/L) Aluminum (Al): <7.64 Cesium (Cs): <0.04 Molybdenum (Mo): 1.180 Strontium (Sr): 345.000 Antimony (Sb): 0.860 Chromium (Cr): <0.04 Nickel (Ni): <0.11 Thallium (Tl): <0.03 Arsenic (As): 1.030 Cobalt (Co): 0.060 Niobium (Nb): <0.04 Thorium (Th): <0.02 Barium (Ba): 141.000 Copper (Cu): 59.200 Neodymium (Nd): <0.05 Tin (Sn): <0.04 Beryllium (Be): <0.18 Gallium (Ga): <0.05 Palladium (Pd): 0.079 Titanium (Ti): 0.246 Boron (B): 24.800 Lanthanum (La): <0.02 Praseodymium (Pr): <0.02 Tungsten (W): <0.2 Bromide (Br): <50 Lead (Pb): <0.15 Rubidium (Rb): 1.810 Uranium (U): 2.550 Cadmium (Cd): <0.05 Lithium (Li): 7.650 Silver (Ag): <0.04 Vanadium (V): 1.920 Cerium (Ce): <0.02 Mercury (Hg): NR Selenium (Se): 0.563 Zinc (Zn): 12.200 Zirconium (Zr): <0.05 Field Chemistry and Other Analytical Results **Total Dissolved Solids (mg/L): 250.1 Field Hardness as CaCO3 (mg/L): NR Ammonia (mg/L): NR **Sum of Diss. Constituents (mg/L): 364.77 Hardness as CaCO3: 210.03 T.P. Hydrocarbons (µg/L): NR Field Conductivity (µmhos): 297 Field Alkalinity as CaCO3 (mg/L): 183 PCP (µg/L): NR Lab Conductivity (µmhos): 433 Alkalinity as CaCO3 (mg/L): 185.36 Phosphorus, TD (mg/L): <0.030 Field pH: 7.58 Ryznar Stability Index: 7.062 Field Nitrate (mg/L): NR Lab pH: 7.92 Sodium Adsorption Ratio: 0.2702 Field Dissolved O2 (mg/L): 3.850 Water Temp (°C): 8.11 Langlier Saturation Index: 0.429 Field Chloride (mg/L): NR Air Temp (°C): NR Nitrite (mg/L as N): NR Field Redox (mV): 19.7 Nitrate + Nitrite (mg/L as N) NR Hydroxide (mg/L as OH): NR Lab, Dissolved Organic Carbon (mg/L): 0.730 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.