ALAMEDA COUNTY WATER DISTRICT Water Quality Report
Serving roughly 344,000 people in Alameda County, California.
Data current as of July 2026
🔍Straight from EPA
🧪Real Lab Results
📅Updated Quarterly
🏠Local Expertise
Results for ALAMEDA COUNTY WATER DISTRICT
1 water provider directly on file, serving roughly 344,000 people in Alameda County, California.
Quick answer: ALAMEDA COUNTY WATER DISTRICT has no violations on file and no single reading stands out against its peers (50 other providers in this area). It serves roughly 344,000 people, and the full breakdown below reflects everything EPA and California have on record for it.
Lead Summary
Copper Summary
Alkalinity, Total
TDS
Chloride
Sulfate
Perfluoroctanesulfonicacid (PFOS)
Perfluorobutanoicacid (PFBA)
Turbidity
pH
Odor
Iron
Chromium, Hex
Conductivity (at 25°C)
Alkalinity, Bicarbonate
Foamingagents (SURFACTANTS)
Fluoride
Nitrate
Nitrate-Nitrite
Perfluorobutanesulfonicacid (PFBS)
Perfluorohexanesulfonicacid (PFHxS)
Perfluoroctanoicacid (PFOA)
Perfluorohexanoicacid (PFHXA)
Perfluoropentanoicacid (PFPEA)
Perfluoroheptanoicacid (PFHPA)
Utility ALAMEDA COUNTY WATER DISTRICTPopulation served 344,000Owner 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
Copper Summary
Detected: 1.8 mg/L (ppm)
12/31/1992
Iron
Detected: 24 UG/L (ppb)
10/21/2025
Mostly an aesthetic issue (metallic taste, staining) rather than a health concern at typical levels.
Chromium, Hex
Detected: 0.12 UG/L (ppb)
10/21/2025
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Chloride
Detected: 71.5 MG/L (ppm)
10/13/2025
Sulfate
Detected: 74.8 MG/L (ppm)
10/1/2025
Fluoride
Detected: 0.22 MG/L (ppm)
8/20/2025
Often added deliberately for dental health; can also occur naturally.
Nitrate
Detected: 0.66 MG/L (ppm)
10/13/2025
Commonly from agricultural fertilizer runoff or septic systems. Above the legal limit, it's an immediate concern especially for infants.
Nitrate-Nitrite
Detected: 2.53 MG/L (ppm)
8/20/2025
Properties
General water characteristics like pH, hardness, and cloudiness (turbidity)
pH
Detected: 8.1 PH
10/21/2025
A measure of how acidic or basic the water is (7 is neutral). Affects taste and plumbing, not a direct health measure.
Calculated Parameters
Values worked out mathematically from other test results, not measured directly
Alkalinity, Bicarbonate
Detected: 200 MG/L (ppm)
8/20/2025
Other
Additional substances tested that don't fit neatly into the categories above
Alkalinity, Total
Detected: 210 MG/L (ppm)
10/1/2025
TDS
Detected: 430 MG/L (ppm)
10/1/2025
Perfluoroctanesulfonicacid (PFOS)
Detected: 2.1 NG/L (ppt)
10/13/2025
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
Perfluorobutanoicacid (PFBA)
Detected: 3.9 NG/L (ppt)
10/13/2025
Turbidity
Detected: 0.2 NTU
10/21/2025
A measure of water cloudiness from suspended particles.
Odor
Detected: 1.4 TON
7/29/2025
Conductivity (at 25°C)
Detected: 509 UMHO/CM
10/21/2025
Foamingagents (SURFACTANTS)
Detected: 0.12 MG/L (ppm)
9/15/2025
Perfluorobutanesulfonicacid (PFBS)
Detected: 6.7 NG/L (ppt)
10/13/2025
Perfluorohexanesulfonicacid (PFHxS)
Detected: 6 NG/L (ppt)
10/13/2025
Perfluoroctanoicacid (PFOA)
Detected: 2.2 NG/L (ppt)
10/13/2025
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
Perfluorohexanoicacid (PFHXA)
Detected: 2 NG/L (ppt)
10/13/2025
Perfluoropentanoicacid (PFPEA)
Detected: 2.1 NG/L (ppt)
10/13/2025
Perfluoroheptanoicacid (PFHPA)
Detected: 2.1 NG/L (ppt)
7/21/2025
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.