Serving roughly 1,442,800 people in Alameda County, California.
Data current as of July 2026
🔍Straight from EPA
🧪Real Lab Results
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Results for EAST BAY MUD
1 water provider directly on file, serving roughly 1,442,800 people in Alameda County, California.
Quick answer: EAST BAY MUD has no violations on file. One reading is worth knowing about: Fluoride was measured at 0.81MG/L, among the highest of the 50 providers on file in this area. It's the most notable figure in this system's record among its 50 local peers.
Lead Summary
PFBA
Magnesium
Potassium
Sodium
Calcium
Alkalinity, Total
Alkalinity, Bicarbonate
Alkalinity, Carbonate
Hardness, Total (ASCACO3)
TDS
Chloride
Sulfate
Fluoride
Hydroxideascalciumcarbonate
Utility EAST BAY MUDPopulation served 1,442,800Owner 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
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Chloride
Detected: 4.2 MG/L (ppm)
9/2/2025
Sulfate
Detected: 1 MG/L (ppm)
9/2/2025
Fluoride
Detected: 0.81 MG/L (ppm)
9/30/2025
Often added deliberately for dental health; can also occur naturally.
Minerals
Everyday minerals that mainly affect taste and water hardness
Magnesium
Detected: 0.828 MG/L (ppm)
9/2/2025
Potassium
Detected: 0.485 MG/L (ppm)
9/2/2025
Sodium
Detected: 5.86 MG/L (ppm)
9/2/2025
Calcium
Detected: 5.29 MG/L (ppm)
9/2/2025
Hydroxideascalciumcarbonate
Detected: 7.2 MG/L (ppm)
6/24/2025
Properties
General water characteristics like pH, hardness, and cloudiness (turbidity)
Hardness, Total (ASCACO3)
Detected: 16 MG/L (ppm)
9/2/2025
PFAS & Emerging Contaminants
Human-made "forever chemicals" and other substances not yet fully regulated
PFBA
Detected: 0.0051 µg/L (ppb)
10/24/2023
Calculated Parameters
Values worked out mathematically from other test results, not measured directly
Alkalinity, Bicarbonate
Detected: 17 MG/L (ppm)
7/9/2025
Alkalinity, Carbonate
Detected: 24 MG/L (ppm)
7/9/2025
Other
Additional substances tested that don't fit neatly into the categories above
Alkalinity, Total
Detected: 23 MG/L (ppm)
9/2/2025
TDS
Detected: 37 MG/L (ppm)
9/2/2025
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.