Ground-Water Information Center Water Quality Report Site Name: LCWQPD - WARREN SCHOOL NORTH WELL  Report Date: 4/24/2024 Compare to Water Quality Standards Location Information Sample Id/Site Id: 2003Q0366 / 191550 Sample Date: 8/26/2002 Location (TRS): 10N 03W 11 CCAB Agency/Sampler: MBMG / JPM Latitude/Longitude: 46° 38' 6" N 111° 57' 14" W Field Number: 191550 Datum: WGS84 Lab Date: 12/23/2002 Altitude: 3740.44 Lab/Analyst: MBMG / KTH County/State: LEWIS AND CLARK / MT Sample Method/Handling: PUMPED / 3120 Site Type: WELL Procedure Type: DISSOLVED Geology: 110ALVM Total Depth (ft): 47 USGS 7.5' Quad: LAKE HELENA SWL-MP (ft): 8 PWS Id: Depth Water Enters (ft): 37 Project: LCWQPD, GWAAMON, COLIPHAGE Major Ion Results mg/L meq/L mg/L meq/L Calcium (Ca) 31.200 1.557 Bicarbonate (HCO3) 110.500 1.811 Magnesium (Mg) 7.050 0.580 Carbonate (CO3) 0.000 0.000 Sodium (Na) 12.200 0.531 Chloride (Cl) 4.070 0.115 Potassium (K) 2.500 0.064 Sulfate (SO4) 41.100 0.856 Iron (Fe) 0.041 0.001 Nitrate (as N) 0.307 0.022 Manganese (Mn) 0.002 0.000 Fluoride (F) 0.287 0.015 Silica (SiO2) 21.000 Orthophosphate (as P) <.05 0.000 Total Cations 2.738 Total Anions 2.819 Trace Element Results (µg/L) Aluminum (Al): <30 Cesium (Cs): NR Molybdenum (Mo): <10 Strontium (Sr): 229.000 Antimony (Sb): <10 Chromium (Cr): <10 Nickel (Ni): 2.820 Thallium (Tl): <20 Arsenic (As): <10 Cobalt (Co): <2 Niobium (Nb): NR Thorium (Th): NR Barium (Ba): 39.800 Copper (Cu): <5 Neodymium (Nd): NR Tin (Sn): NR Beryllium (Be): <2 Gallium (Ga): NR Palladium (Pd): NR Titanium (Ti): <1 Boron (B): <30 Lanthanum (La): NR Praseodymium (Pr): NR Tungsten (W): NR Bromide (Br): <50 Lead (Pb): <10 Rubidium (Rb): NR Uranium (U): NR Cadmium (Cd): <1 Lithium (Li): 13.300 Silver (Ag): NR Vanadium (V): <10 Cerium (Ce): NR Mercury (Hg): NR Selenium (Se): <15 Zinc (Zn): <2 Zirconium (Zr): <2 Field Chemistry and Other Analytical Results **Total Dissolved Solids (mg/L): 173.93 Field Hardness as CaCO3 (mg/L): NR Ammonia (mg/L): NR **Sum of Diss. Constituents (mg/L): 230.25 Hardness as CaCO3: 106.92 T.P. Hydrocarbons (µg/L): NR Field Conductivity (µmhos): NR Field Alkalinity as CaCO3 (mg/L): NR PCP (µg/L): NR Lab Conductivity (µmhos): 285 Alkalinity as CaCO3 (mg/L): 91.04 Phosphorus, TD (mg/L): <0.05 Field pH: NR Ryznar Stability Index: 8.933 Field Nitrate (mg/L): NR Lab pH: 7.16 Sodium Adsorption Ratio: 0.505 Field Dissolved O2 (mg/L): NR Water Temp (°C): NR Langlier Saturation Index: -0.887 Field Chloride (mg/L): NR Air Temp (°C): NR Nitrite (mg/L as N): <.05 Field Redox (mV): NR Nitrate + Nitrite (mg/L as N) NR 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) 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.