CALIFORNIA WATER SERVICE CO. - DIXON Water Quality Report
Serving roughly 10,623 people in Solano County, California.
Data current as of July 2026
🔍Straight from EPA
🧪Real Lab Results
📅Updated Quarterly
🏠Local Expertise
Results for CALIFORNIA WATER SERVICE CO. - DIXON
1 water provider directly on file, serving roughly 10,623 people in Solano County, California.
Quick answer: CALIFORNIA WATER SERVICE CO. - DIXON has no violations on file. One reading is worth knowing about: Selenium was measured at 7.4UG/L, among the highest of the 186 providers on file in this area. It's the most notable figure in this system's record among its 186 local peers.
Lead Summary
Lithium
Lead
Copper, Free
Chloride
Sulfate
Fluoride
Nitrate
Vanadium, Total
Chromium, Hex
Chromium
Arsenic
Selenium
Zinc
Aggressive Index
Langelier Index (pH(s))
Magnesium
Sodium
Calcium
Alkalinity, Total
Alkalinity, Bicarbonate
Hardness, Total (ASCACO3)
TDS
Nitrate-Nitrite
Orthophosphate
Potassium
Turbidity
Combined Uranium
Gross Beta Particle Activity
pH, Field
Lithium, Total
Strontium
Utility CALIFORNIA WATER SERVICE CO. - DIXONPopulation served 10,623Owner Private
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)
12/31/2025
Lead
Detected: 1.4 UG/L (ppb)
7/23/2025
A metal that can leach from old pipes, solder, and fixtures. Current medical guidance holds there is no truly safe level of lead exposure, especially for children and pregnant women.
Copper, Free
Detected: 3.3 UG/L (ppb)
9/10/2025
Vanadium, Total
Detected: 8.9 UG/L (ppb)
9/10/2025
Chromium, Hex
Detected: 2.8 UG/L (ppb)
10/7/2025
Chromium
Detected: 6.5 UG/L (ppb)
9/10/2025
Occurs in two forms — trivalent (an essential nutrient in trace amounts) and hexavalent (linked to increased cancer risk).
Arsenic
Detected: 2.2 UG/L (ppb)
9/10/2025
Occurs naturally in some groundwater. Long-term exposure above the legal limit (10 ppb) has been linked to increased cancer risk and cardiovascular disease.
Selenium
Detected: 7.4 UG/L (ppb)
8/13/2025
Zinc
Detected: 2.3 UG/L (ppb)
9/10/2025
Combined Uranium
Detected: 1.3 PCI/L
10/9/2025
A naturally occurring radioactive metal. Long-term exposure above the legal limit is associated with kidney effects and increased cancer risk.
Lithium, Total
Detected: 28 UG/L (ppb)
3/4/2025
Strontium
Detected: 570 UG/L (ppb)
3/4/2025
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Chloride
Detected: 14 MG/L (ppm)
9/10/2025
Sulfate
Detected: 22 MG/L (ppm)
8/13/2025
Fluoride
Detected: 0.1 MG/L (ppm)
9/10/2025
Often added deliberately for dental health; can also occur naturally.
Nitrate
Detected: 3.4 MG/L (ppm)
9/10/2025
Commonly from agricultural fertilizer runoff or septic systems. Above the legal limit, it's an immediate concern especially for infants.
Nitrate-Nitrite
Detected: 0.47 MG/L (ppm)
7/23/2025
Minerals
Everyday minerals that mainly affect taste and water hardness
Magnesium
Detected: 16 MG/L (ppm)
7/23/2025
Sodium
Detected: 75 MG/L (ppm)
7/23/2025
Calcium
Detected: 16 MG/L (ppm)
7/23/2025
Potassium
Detected: 2.4 MG/L (ppm)
7/23/2025
Properties
General water characteristics like pH, hardness, and cloudiness (turbidity)
Langelier Index (pH(s))
Detected: -0.7 LANG
7/23/2025
Hardness, Total (ASCACO3)
Detected: 110 MG/L (ppm)
7/23/2025
Orthophosphate
Detected: 0.3 MG/L (ppm)
6/24/2025
pH, Field
Detected: 7.28 PH
7/23/2025
PFAS & Emerging Contaminants
Human-made "forever chemicals" and other substances not yet fully regulated
Lithium
Detected: 33 µg/L (ppb)
5/15/2024
Occurs naturally in some groundwater. Not currently federally regulated in drinking water.
Calculated Parameters
Values worked out mathematically from other test results, not measured directly
Alkalinity, Bicarbonate
Detected: 210 MG/L (ppm)
7/23/2025
Other
Additional substances tested that don't fit neatly into the categories above
Aggressive Index
Detected: 11.2 AGGR
7/23/2025
Alkalinity, Total
Detected: 210 MG/L (ppm)
7/23/2025
TDS
Detected: 300 MG/L (ppm)
7/23/2025
Turbidity
Detected: 0.52 NTU
7/23/2025
A measure of water cloudiness from suspended particles.
Gross Beta Particle Activity
Detected: 2.05 PCI/L
10/9/2025
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.