SFPUC CITY DISTRIBUTION DIVISION Water Quality Report
Serving roughly 848,019 people in San Francisco County, California.
Data current as of July 2026
🔍Straight from EPA
🧪Real Lab Results
📅Updated Quarterly
🏠Local Expertise
Results for SFPUC CITY DISTRIBUTION DIVISION
1 water provider directly on file, serving roughly 848,019 people in San Francisco County, California.
Quick answer: SFPUC CITY DISTRIBUTION DIVISION has no violations on file. One reading is worth knowing about: Calcium was measured at 32.2MG/L, among the highest of the 36 providers on file in this area. It's the most notable figure in this system's record among its 36 local peers.
Lead Summary
Totalhaloaceticacids (HAA5)
TTHM
Chloroform
Bromodichloromethane
Dibromochloromethane
Dichloroaceticacid
Trichloroaceticacid
Magnesium
Sodium
Calcium
Alkalinity, Total
Alkalinity, Bicarbonate
Hardness, Total (ASCACO3)
Foamingagents (SURFACTANTS)
TDS
Sulfate
Chloride
Carbon, Total
Nitrate-Nitrite
Nitrate
Turbidity
Chromium, Hex
Carbontetrachloride
Tetrachloroethylene
Perchlorate
Chromium
Arsenic
Conductivity (at 25°C)
Color
Alkalinity, Carbonate
Chlorate
Utility SFPUC CITY DISTRIBUTION DIVISIONPopulation served 848,019Owner Local government
No violations on file
Contaminants found
Metals
Naturally occurring or corrosion-related elements, e.g. lead, arsenic, copper
Lead Summary
Detected: 0 mg/L (ppm)
12/31/2024
Chromium, Hex
Detected: 16.7 UG/L (ppb)
7/9/2025
Chromium
Detected: 21.1 UG/L (ppb)
7/9/2025
Occurs in two forms — trivalent (an essential nutrient in trace amounts) and hexavalent (linked to increased cancer risk).
Arsenic
Detected: 2.02 UG/L (ppb)
7/9/2025
Occurs naturally in some groundwater. Long-term exposure above the legal limit (10 ppb) has been linked to increased cancer risk and cardiovascular disease.
Disinfection Byproducts
Formed when chlorine used to disinfect water reacts with organic matter
Totalhaloaceticacids (HAA5)
Detected: 34.1 UG/L (ppb)
6/2/2025
TTHM
Detected: 49.7 UG/L (ppb)
6/2/2025
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: 47.9 UG/L (ppb)
6/2/2025
One of the individual trihalomethane disinfection byproducts, formed when chlorine reacts with organic matter.
Bromodichloromethane
Detected: 1.81 UG/L (ppb)
6/2/2025
Dibromochloromethane
Detected: 2.12 UG/L (ppb)
6/2/2025
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Sulfate
Detected: 32.8 MG/L (ppm)
7/9/2025
Chloride
Detected: 35.4 MG/L (ppm)
7/9/2025
Nitrate-Nitrite
Detected: 11.4 MG/L (ppm)
7/9/2025
Nitrate
Detected: 11.4 MG/L (ppm)
7/9/2025
Commonly from agricultural fertilizer runoff or septic systems. Above the legal limit, it's an immediate concern especially for infants.
Minerals
Everyday minerals that mainly affect taste and water hardness
Magnesium
Detected: 31.4 MG/L (ppm)
7/9/2025
Sodium
Detected: 29.4 MG/L (ppm)
7/9/2025
Calcium
Detected: 32.2 MG/L (ppm)
7/9/2025
Properties
General water characteristics like pH, hardness, and cloudiness (turbidity)
Hardness, Total (ASCACO3)
Detected: 220 MG/L (ppm)
7/9/2025
VOCs (Volatile Organic Compounds)
Industrial solvents and fuel-related chemicals that evaporate easily
Carbontetrachloride
Detected: 0.6 UG/L (ppb)
8/13/2025
Tetrachloroethylene
Detected: 1.9 UG/L (ppb)
10/14/2025
Calculated Parameters
Values worked out mathematically from other test results, not measured directly
Alkalinity, Bicarbonate
Detected: 150 MG/L (ppm)
7/9/2025
Alkalinity, Carbonate
Detected: 6.33 MG/L (ppm)
6/11/2025
Other
Additional substances tested that don't fit neatly into the categories above
Dichloroaceticacid
Detected: 16.6 UG/L (ppb)
6/2/2025
Trichloroaceticacid
Detected: 17.5 UG/L (ppb)
6/2/2025
Alkalinity, Total
Detected: 153 MG/L (ppm)
7/9/2025
Foamingagents (SURFACTANTS)
Detected: 0.12 MG/L (ppm)
7/9/2025
TDS
Detected: 367 MG/L (ppm)
7/9/2025
Carbon, Total
Detected: 0.311 MG/L (ppm)
7/9/2025
Turbidity
Detected: 0.2 NTU
7/9/2025
A measure of water cloudiness from suspended particles.
Perchlorate
Detected: 2 UG/L (ppb)
7/9/2025
Can occur naturally or from industrial/military sources; may interfere with thyroid function at elevated levels.
Conductivity (at 25°C)
Detected: 558 UMHO/CM
7/9/2025
Color
Detected: 5 UNITS
7/9/2025
Chlorate
Detected: 54.1 UG/L (ppb)
6/11/2025
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.