Tap Water in San Mateo, California

Overall rating

High concern tap water rating

Water systems

• Water systems serving ZIP 94403

  Score 20 · 27 contaminants · 17 over guideline

• Haloacetic acids (HAA9)Water systems serving ZIP 944030.0285 mg/L
• Haloacetic acids (HAA5)Water systems serving ZIP 944030.0362 mg/L
• Total Trihalomethanes Water systems serving ZIP 944030.0412 mg/L
• Trichloroacetic acidWater systems serving ZIP 944030.0132 mg/L
• ChloroformWater systems serving ZIP 944030.0395 mg/L
• Dichloroacetic acidWater systems serving ZIP 944030.0196 mg/L
• BromodichloromethaneWater systems serving ZIP 944030.0019 mg/L
• Propylene NitrateWater systems serving ZIP 944033.2805
• Propylene NitrateWater systems serving ZIP 944032.9462
• ArsenicWater systems serving ZIP 944037.88e-5 mg/L
• DibromochloromethaneWater systems serving ZIP 944037.91e-4 mg/L
• BromateWater systems serving ZIP 944034.00e-4 mg/L
• Chromium (hexavalent)Water systems serving ZIP 944034.92e-5 mg/L
• Dibromoacetic acidWater systems serving ZIP 944035.12e-5 mg/L
• ChlorateWater systems serving ZIP 944030.1509 mg/L
• UraniumWater systems serving ZIP 944030.2063 pCi/L
• PerchlorateWater systems serving ZIP 944033.32e-4 ppm
• Aluminum FluorideWater systems serving ZIP 944039.1556
• Monochloroacetic acidWater systems serving ZIP 944037.18e-4 ppm
• BariumWater systems serving ZIP 944030.0023 mg/L
• Strontium-90 Water systems serving ZIP 944031.37e-4 pCi/L
• Aluminum FluorideWater systems serving ZIP 944030.2718
• Chromium (hexavalent)Water systems serving ZIP 944030.003 mg/L
• Benzalkonium BromideWater systems serving ZIP 944039.275
• Vanadium (as Vanadium Amino Acid Chelate)Water systems serving ZIP 944030.8438
• Molybdenum (molybdenum (VI) citrate, molybdenum (VI) bisglycinate)Water systems serving ZIP 944030.1625
• ManganeseWater systems serving ZIP 944030.0047 mg/L