This is the water report that I got for my house, zip code 20147. Your mileage may vary
pH 7.6
Total Dissolved Solids (TDS) Est, ppm 239
Electrical Conductivity, mmho/cm 0.40
Cations / Anions, me/L 4.0 / 4.2
Sodium (Na) 13 ppm
Potassium (K) 1 ppm
Calcium (Ca) 50.1 ppm
Magnesium (Mg) 11 ppm
Total Hardness (CaCO3) 171 ppm
Nitrate (NO3-N) 1.5 ppm (SAFE)
Sulfate (SO4-S) 14 ppm
Chloride (Cl )18 ppm
Carbonate (CO3) < 1.0 ppm
Bicarbonate (HCO3) 167 ppm
Total Alkalinity (CaCO3) 138 ppm
Total Phosphorus § 0.46 ppm
Total Iron (Fe) < 0.01 ppm
