Serving roughly 81,501 people in Santa Clara County, California.
Data current as of July 2026
🔍Straight from EPA
🧪Real Lab Results
📅Updated Quarterly
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Results for CITY OF MOUNTAIN VIEW
1 water provider directly on file, serving roughly 81,501 people in Santa Clara County, California.
Quick answer: CITY OF MOUNTAIN VIEW has no violations on file. One reading is worth knowing about: Chloroform was measured at 58.29UG/L, among the highest of the 320 providers on file in this area. It's the most notable figure in this system's record among its 320 local peers.
Lead Summary
Lithium
Fluoride
Nitrate
Radium-228
Combined Radium (-226 & -228)
Gross Alpha Particle Activity
Lead
Totalhaloaceticacids (HAA5)
TTHM
Chloroform
Bromodichloromethane
Dibromochloromethane
Dichloroaceticacid
Trichloroaceticacid
Bromoform
Dibromoaceticacid
Monobromoaceticacid
Copper, Free
Utility CITY OF MOUNTAIN VIEWPopulation served 81,501Owner Local government
Naturally occurring or corrosion-related elements, e.g. lead, arsenic, copper
Lead Summary
Detected: 0 mg/L (ppm)
12/31/2025
Lead
Detected: 5.4 UG/L (ppb)
9/3/2025
A metal that can leach from old pipes, solder, and fixtures. Current medical guidance holds there is no truly safe level of lead exposure, especially for children and pregnant women.
Copper, Free
Detected: 88 UG/L (ppb)
9/3/2025
Disinfection Byproducts
Formed when chlorine used to disinfect water reacts with organic matter
Totalhaloaceticacids (HAA5)
Detected: 37.3 UG/L (ppb)
8/13/2025
TTHM
Detected: 59.31 UG/L (ppb)
8/13/2025
A group of disinfection byproducts formed when chlorine reacts with organic matter. Long-term exposure above the legal limit has been linked to increased cancer risk in some studies.
Chloroform
Detected: 58.29 UG/L (ppb)
8/13/2025
One of the individual trihalomethane disinfection byproducts, formed when chlorine reacts with organic matter.
Bromodichloromethane
Detected: 1.02 UG/L (ppb)
8/13/2025
Dibromochloromethane
Detected: 14.43 UG/L (ppb)
8/13/2025
Bromoform
Detected: 5.11 UG/L (ppb)
8/13/2025
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Fluoride
Detected: 0.12 MG/L (ppm)
5/7/2025
Often added deliberately for dental health; can also occur naturally.
Nitrate
Detected: 5.7 MG/L (ppm)
8/13/2025
Commonly from agricultural fertilizer runoff or septic systems. Above the legal limit, it's an immediate concern especially for infants.
Properties
General water characteristics like pH, hardness, and cloudiness (turbidity)
Gross Alpha Particle Activity
Detected: 1.55 PCI/L
1/8/2025
PFAS & Emerging Contaminants
Human-made "forever chemicals" and other substances not yet fully regulated
Lithium
Detected: 9.3 µg/L (ppb)
3/8/2023
Occurs naturally in some groundwater. Not currently federally regulated in drinking water.
Other
Additional substances tested that don't fit neatly into the categories above
Radium-228
Detected: 0.614 PCI/L
8/27/2025
Combined Radium (-226 & -228)
Detected: 0.674 PCI/L
8/27/2025
A naturally occurring radioactive element found in some groundwater.
Dichloroaceticacid
Detected: 22.4 UG/L (ppb)
8/13/2025
Trichloroaceticacid
Detected: 14.9 UG/L (ppb)
8/13/2025
Dibromoaceticacid
Detected: 5.5 UG/L (ppb)
8/13/2025
Monobromoaceticacid
Detected: 1.3 UG/L (ppb)
8/13/2025
Filtration considerations: See the table below for how whole-house carbon, under-sink reverse osmosis, and under-sink carbon systems compare against what's actually on file here. These are general system types, not a specific product recommendation.