Ground-Water Information Center Water Quality Report Site Name: N. FORK BLACKFOOT RIVER  Report Date: 5/2/2024 Compare to Water Quality Standards Location Information Sample Id/Site Id: 2001Q0550 / 183608 Sample Date: 9/4/2000 7:30:00 PM Location (TRS): 15N 11W 14 BCDC Agency/Sampler: MBMG / JKF Latitude/Longitude: 47° 3' 24" N 112° 57' 37" W Field Number: 183608 Datum: NAD27 Lab Date: 1/8/2001 Altitude: Lab/Analyst: MBMG / JMC County/State: POWELL / MT Sample Method/Handling: GRAB / 4220 Site Type: STREAM Procedure Type: DISSOLVED Geology: Staff Gage Reading: NR USGS 7.5' Quad: COOPERS LAKE Stream Stage: NR PWS Id: Stream Discharge (cfs): NR  -  NR Project: GWCP05 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) 28.300 1.412 Bicarbonate (HCO3) 148.400 2.432 Magnesium (Mg) 11.600 0.955 Carbonate (CO3) 0.000 0.000 Sodium (Na) 1.100 0.048 Chloride (Cl) <.5 0.000 Potassium (K) 0.482 0.012 Sulfate (SO4) 3.450 0.072 Iron (Fe) <.005 0.000 Nitrate (as N) <.5 P 0.000 Manganese (Mn) <.001 0.000 Fluoride (F) <.05 0.000 Silica (SiO2) 5.670 Orthophosphate (as P) <.05 0.000 Total Cations 2.428 Total Anions 2.504 Trace Element Results (µg/L) Aluminum (Al): <30 Cesium (Cs): NR Molybdenum (Mo): <10 Strontium (Sr): 65.900 Antimony (Sb): <2 Chromium (Cr): <2 Nickel (Ni): <2 Thallium (Tl): <5 Arsenic (As): <1 Cobalt (Co): <2 Niobium (Nb): NR Thorium (Th): NR Barium (Ba): 188.000 Copper (Cu): <2 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): <2 Rubidium (Rb): NR Uranium (U): NR Cadmium (Cd): <2 Lithium (Li): 2.310 Silver (Ag): <1 Vanadium (V): <5 Cerium (Ce): NR Mercury (Hg): NR Selenium (Se): <1 Zinc (Zn): <2 Zirconium (Zr): <2 Field Chemistry and Other Analytical Results **Total Dissolved Solids (mg/L): 122.81 Field Hardness as CaCO3 (mg/L): NR Ammonia (mg/L): NR **Sum of Diss. Constituents (mg/L): 197.9 Hardness as CaCO3: 118.41 T.P. Hydrocarbons (µg/L): NR Field Conductivity (µmhos): 248 Field Alkalinity as CaCO3 (mg/L): NR PCP (µg/L): NR Lab Conductivity (µmhos): 245 Alkalinity as CaCO3 (mg/L): 121.39 Phosphorus, TD (mg/L): <.05 Field pH: NR Ryznar Stability Index: 7.658 Field Nitrate (mg/L): NR Lab pH: 8.27 Sodium Adsorption Ratio: 0.04 Field Dissolved O2 (mg/L): NR Water Temp (°C): NR Langlier Saturation Index: 0.306 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): 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: CLEAR Field Remarks: Lab Remarks:

Explanation: mg/L = milligrams per Liter; µg/L = micrograms per Liter; ft = feet; NR = No Reading in GWIC Qualifiers: A = Hydride atomic absorption; E = Estimated due to interference; H = Exceeded holding time; J = Estimated quantity above detection limit but below reporting limit; K = Na+K combined; N = Spiked sample recovery not within control limits; 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.