Ground-Water Information Center Water Quality Report Site Name: USGS * MERRITT LANE 
Report Date: 1/15/2021 Compare to Water Quality Standards

Location Information
Sample Id/Site Id: 1979Q2990 / 5816 Sample Date: 7/3/1979
Location (TRS): 11N 02W 30 DCAD Agency/Sampler: USGS /
Latitude/Longitude: 46° 40' 40" N 111° 53' 58" W Field Number: 4-26
Datum: NAD83 Lab Date: 7/27/1979
Altitude: 3685 Lab/Analyst: MBMG / FNA
County/State: LEWIS AND CLARK / MT Sample Method/Handling: GRAB / 4220
Site Type: WELL Procedure Type: DISSOLVED
Geology: 110ALVM Total Depth (ft): 45.4
USGS 7.5' Quad: LAKE HELENA 7 1/2' SWL-MP (ft): NR
PWS Id: Depth Water Enters (ft): 41
Project: GWAAMON
Major Ion Results
mg/L meq/L mg/L meq/L
Calcium (Ca) 91.400 4.561 Bicarbonate (HCO3) 311.000 5.097
Magnesium (Mg) 8.900 0.732 Carbonate (CO3) 0.000 0.000
Sodium (Na) 27.300 1.188 Chloride (Cl) 11.700 0.330
Potassium (K) 1.000 0.026 Sulfate (SO4) 45.800 0.954
Iron (Fe) 0.020 0.001 Nitrate (as N) 1.717 0.123
Manganese (Mn) 0.030 0.001 Fluoride (F) 0.400 0.021
Silica (SiO2) 41.600 Orthophosphate (as P) NR 0.000
Total Cations 6.508 Total Anions 6.525
Trace Element Results (µg/L)
Aluminum (Al): NR Cesium (Cs): NR Molybdenum (Mo): NR Strontium (Sr): NR
Antimony (Sb): NR Chromium (Cr): NR Nickel (Ni): NR Thallium (Tl): NR
Arsenic (As): NR Cobalt (Co): NR Niobium (Nb): NR Thorium (Th): NR
Barium (Ba): NR Copper (Cu): NR Neodymium (Nd): NR Tin (Sn): NR
Beryllium (Be): NR Gallium (Ga): NR Palladium (Pd): NR Titanium (Ti): NR
Boron (B): NR Lanthanum (La): NR Praseodymium (Pr): NR Tungsten (W): NR
Bromide (Br): NR Lead (Pb): NR Rubidium (Rb): NR Uranium (U): NR
Cadmium (Cd): NR Lithium (Li): 30.000 Silver (Ag): NR Vanadium (V): NR
Cerium (Ce): NR Mercury (Hg): NR Selenium (Se): NR Zinc (Zn): NR
Zirconium (Zr): NR
Field Chemistry and Other Analytical Results
**Total Dissolved Solids (mg/L): 383.5 Field Hardness as CaCO3 (mg/L): NR Ammonia (mg/L): NR
**Sum of Diss. Constituents (mg/L): 541.3 Hardness as CaCO3: 264.86 T.P. Hydrocarbons (µg/L): NR
Field Conductivity (µmhos): 652 Field Alkalinity as CaCO3 (mg/L): NR PCP (µg/L): NR
Lab Conductivity (µmhos): NR Alkalinity as CaCO3 (mg/L): 255.07 Phosphorus, TD (mg/L): NR
Field pH: NR Ryznar Stability Index: 6.845 Field Nitrate (mg/L): NR
Lab pH: 7.42 Sodium Adsorption Ratio: 0.722 Field Dissolved O2 (mg/L): NR
Water Temp (°C): NR Langlier Saturation Index: 0.288 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
Sample Condition:
Field Remarks: HELENA VALLEY
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.
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.