LOS ANGELES is served by 1 water provider on file with the EPA.
Data current as of July 2026
🔍Straight from EPA
🧪Real Lab Results
📅Updated Quarterly
🏠Local Expertise
Results for LOS ANGELES, CA
1 water provider on file serving this city.
Quick answer: LOS ANGELES'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 7,751,132 people, and the full breakdown below reflects everything EPA and California have on record for it.
Lead Summary
Lithium
Langelier Index (Source Temp.)
Magnesium
Silica
Potassium
Sodium
Calcium
Hardness, Total (ASCACO3)
Bromide
Alkalinity, Total
Alkalinity, Bicarbonate
Orthophosphate
Carbon, Total
TDS
Chloride
Sulfate
Fluoride
Nitrate-Nitrite
Nitrate
Turbidity
Combined Uranium
38-Strontium-90
Gross Alpha Particle Activity
Gross Beta Particle Activity
pH, Field
Odor
Boron, Total
Phosphate, Total
Iron
Manganese
Barium
Arsenic
Aluminum
Copper, Free
Zinc
Conductivity (at 25°C)
Color
Contaminants found
Metals
Naturally occurring or corrosion-related elements, e.g. lead, arsenic, copper
Lead Summary
Detected: 0.0039 mg/L (ppm)
12/31/2023
Combined Uranium
Detected: 3.2 PCI/L
8/27/2025
A naturally occurring radioactive metal. Long-term exposure above the legal limit is associated with kidney effects and increased cancer risk.
38-Strontium-90
Detected: 0.611 PCI/L
2/19/2025
Iron
Detected: 198 UG/L (ppb)
8/27/2025
Mostly an aesthetic issue (metallic taste, staining) rather than a health concern at typical levels.
Manganese
Detected: 36.5 UG/L (ppb)
8/27/2025
Mainly a taste/staining concern at typical levels; long-term neurological research at high chronic exposure is ongoing.
Barium
Detected: 18.1 UG/L (ppb)
8/27/2025
Arsenic
Detected: 7.8 UG/L (ppb)
9/29/2025
Occurs naturally in some groundwater. Long-term exposure above the legal limit (10 ppb) has been linked to increased cancer risk and cardiovascular disease.
Aluminum
Detected: 70.6 UG/L (ppb)
8/27/2025
Copper, Free
Detected: 20.8 UG/L (ppb)
8/27/2025
Zinc
Detected: 10.3 UG/L (ppb)
8/27/2025
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Chloride
Detected: 29 MG/L (ppm)
8/27/2025
Sulfate
Detected: 30.8 MG/L (ppm)
8/27/2025
Fluoride
Detected: 0.56 MG/L (ppm)
8/27/2025
Often added deliberately for dental health; can also occur naturally.
Nitrate-Nitrite
Detected: 0.126 MG/L (ppm)
8/27/2025
Nitrate
Detected: 0.126 MG/L (ppm)
8/27/2025
Commonly from agricultural fertilizer runoff or septic systems. Above the legal limit, it's an immediate concern especially for infants.
Boron, Total
Detected: 559 UG/L (ppb)
8/27/2025
Minerals
Everyday minerals that mainly affect taste and water hardness
Magnesium
Detected: 8.2 MG/L (ppm)
8/27/2025
Potassium
Detected: 4.24 MG/L (ppm)
8/27/2025
Sodium
Detected: 41.7 MG/L (ppm)
8/27/2025
Calcium
Detected: 26 MG/L (ppm)
8/27/2025
Properties
General water characteristics like pH, hardness, and cloudiness (turbidity)
Hardness, Total (ASCACO3)
Detected: 98.7 MG/L (ppm)
8/27/2025
Orthophosphate
Detected: 0.0466 MG/L (ppm)
8/27/2025
Gross Alpha Particle Activity
Detected: 5.06 PCI/L
2/19/2025
pH, Field
Detected: 7.7 PH
9/29/2025
Phosphate, Total
Detected: 40 UG/L (ppb)
8/27/2025
PFAS & Emerging Contaminants
Human-made "forever chemicals" and other substances not yet fully regulated
Lithium
Detected: 47.4 µg/L (ppb)
9/11/2024
Occurs naturally in some groundwater. Not currently federally regulated in drinking water.
VOCs (Volatile Organic Compounds)
Industrial solvents and fuel-related chemicals that evaporate easily
Bromide
Detected: 0.0633 MG/L (ppm)
8/27/2025
Calculated Parameters
Values worked out mathematically from other test results, not measured directly
Alkalinity, Bicarbonate
Detected: 114 MG/L (ppm)
8/27/2025
Other
Additional substances tested that don't fit neatly into the categories above
Langelier Index (Source Temp.)
Detected: 0.321 LANG
2/19/2025
Silica
Detected: 16 MG/L (ppm)
8/27/2025
Alkalinity, Total
Detected: 114 MG/L (ppm)
8/27/2025
Carbon, Total
Detected: 1.99 MG/L (ppm)
8/27/2025
TDS
Detected: 209 MG/L (ppm)
8/27/2025
Turbidity
Detected: 2.9 NTU
8/27/2025
A measure of water cloudiness from suspended particles.
Gross Beta Particle Activity
Detected: 4.68 PCI/L
8/27/2025
Odor
Detected: 2 TON
8/27/2025
Conductivity (at 25°C)
Detected: 382 UMHO/CM
8/27/2025
Color
Detected: 12 UNITS
8/27/2025
Filtration considerations: General system types, not a specific product recommendation.