SOUTH PASADENA is served by 1 water provider on file with the EPA.
Data current as of July 2026
🔍Straight from EPA
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Results for SOUTH PASADENA, CA
1 water provider on file serving this city.
Quick answer: SOUTH PASADENA's water has no violations on file and no single reading stands out against its peers (1 other providers in this area). It serves roughly 25,329 people, and the full breakdown below reflects everything EPA and California have on record for it.
Lead Summary
Nitrate
TTHM
Carbontetrachloride
Tetrachloroethylene
Carbondioxide
Perchlorate
Bromoform
1, 2, 3-Trichloropropane
Fluoride
Trichloroethylene
Contaminants found
Metals
Naturally occurring or corrosion-related elements, e.g. lead, arsenic, copper
Lead Summary
Detected: 0 mg/L (ppm)
12/31/2024
Disinfection Byproducts
Formed when chlorine used to disinfect water reacts with organic matter
TTHM
Detected: 0.58 UG/L (ppb)
3/4/2025
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.
Bromoform
Detected: 1.2 UG/L (ppb)
4/21/2025
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Nitrate
Detected: 9 MG/L (ppm)
10/7/2025
Commonly from agricultural fertilizer runoff or septic systems. Above the legal limit, it's an immediate concern especially for infants.
Fluoride
Detected: 1.1 MG/L (ppm)
8/12/2025
Often added deliberately for dental health; can also occur naturally.
VOCs (Volatile Organic Compounds)
Industrial solvents and fuel-related chemicals that evaporate easily
Carbontetrachloride
Detected: 0.59 UG/L (ppb)
10/7/2025
Tetrachloroethylene
Detected: 16 UG/L (ppb)
10/7/2025
1, 2, 3-Trichloropropane
Detected: 0.021 UG/L (ppb)
10/28/2025
Trichloroethylene
Detected: 0.91 UG/L (ppb)
10/7/2025
Other
Additional substances tested that don't fit neatly into the categories above
Carbondioxide
Detected: 3700 UG/L (ppb)
6/24/2025
Perchlorate
Detected: 4 UG/L (ppb)
10/7/2025
Can occur naturally or from industrial/military sources; may interfere with thyroid function at elevated levels.
Filtration considerations: General system types, not a specific product recommendation.