Serving roughly 56,747 people in Orange County, California.
Data current as of July 2026
🔍Straight from EPA
🧪Real Lab Results
📅Updated Quarterly
🏠Local Expertise
Results for CITY OF FOUNTAIN VALLEY
1 water provider directly on file, serving roughly 56,747 people in Orange County, California.
Quick answer: CITY OF FOUNTAIN VALLEY has no violations on file. One reading is worth knowing about: Silica was measured at 21.5MG/L, among the highest of the 167 providers on file in this area. It's the most notable figure in this system's record among its 167 local peers.
Lead Summary
PFHXS
Lithium
Totalhaloaceticacids (HAA5)
TTHM
Bromoform
Dibromochloromethane
Dibromoaceticacid
Bromodichloromethane
Magnesium
Potassium
Sodium
Calcium
Hardness, Total (ASCACO3)
Bromide
Alkalinity, Bicarbonate
Alkalinity, Total
Silica
Carbon, Total
TDS
Sulfate
Chloride
Fluoride
Nitrate-Nitrite
Nitrate
Nitrite
Perfluorohexanesulfonicacid (PFHxS)
Turbidity
pH
Vanadium, Total
Nickel
Chromium
Barium
Arsenic
Selenium
Copper, Free
Lead
Boron, Total
Iron
Zinc
Utility CITY OF FOUNTAIN VALLEYPopulation served 56,747Owner Local government
Naturally occurring or corrosion-related elements, e.g. lead, arsenic, copper
Lead Summary
Detected: 0.006 mg/L (ppm)
12/31/2024
Vanadium, Total
Detected: 2.9 UG/L (ppb)
5/1/2025
Nickel
Detected: 1.9 UG/L (ppb)
5/1/2025
Chromium
Detected: 1.2 UG/L (ppb)
5/1/2025
Occurs in two forms — trivalent (an essential nutrient in trace amounts) and hexavalent (linked to increased cancer risk).
Barium
Detected: 78.8 UG/L (ppb)
5/1/2025
Arsenic
Detected: 1.2 UG/L (ppb)
7/8/2025
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: 2.2 UG/L (ppb)
5/1/2025
Copper, Free
Detected: 46.3 UG/L (ppb)
5/1/2025
Lead
Detected: 1.6 UG/L (ppb)
5/1/2025
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.
Iron
Detected: 24.4 UG/L (ppb)
5/1/2025
Mostly an aesthetic issue (metallic taste, staining) rather than a health concern at typical levels.
Zinc
Detected: 11.8 UG/L (ppb)
5/1/2025
Disinfection Byproducts
Formed when chlorine used to disinfect water reacts with organic matter
Totalhaloaceticacids (HAA5)
Detected: 1.03 UG/L (ppb)
3/10/2025
TTHM
Detected: 3.9 UG/L (ppb)
9/8/2025
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: 1.11 UG/L (ppb)
3/10/2025
Dibromochloromethane
Detected: 3.9 UG/L (ppb)
9/8/2025
Bromodichloromethane
Detected: 0.7 UG/L (ppb)
3/10/2025
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Sulfate
Detected: 66.7 MG/L (ppm)
7/14/2025
Chloride
Detected: 32.6 MG/L (ppm)
7/14/2025
Fluoride
Detected: 0.32 MG/L (ppm)
7/8/2025
Often added deliberately for dental health; can also occur naturally.
Nitrate-Nitrite
Detected: 1.81 MG/L (ppm)
8/25/2025
Nitrate
Detected: 1.81 MG/L (ppm)
8/25/2025
Commonly from agricultural fertilizer runoff or septic systems. Above the legal limit, it's an immediate concern especially for infants.
Nitrite
Detected: 0.003 MG/L (ppm)
7/8/2025
Boron, Total
Detected: 130 UG/L (ppb)
5/1/2025
Minerals
Everyday minerals that mainly affect taste and water hardness
Magnesium
Detected: 12.3 MG/L (ppm)
7/8/2025
Potassium
Detected: 2.1 MG/L (ppm)
7/8/2025
Sodium
Detected: 36.2 MG/L (ppm)
7/8/2025
Calcium
Detected: 65.9 MG/L (ppm)
8/25/2025
Properties
General water characteristics like pH, hardness, and cloudiness (turbidity)
Hardness, Total (ASCACO3)
Detected: 217 MG/L (ppm)
7/8/2025
pH
Detected: 8 PH
8/25/2025
A measure of how acidic or basic the water is (7 is neutral). Affects taste and plumbing, not a direct health measure.
PFAS & Emerging Contaminants
Human-made "forever chemicals" and other substances not yet fully regulated
PFHXS
Detected: 0.0035 µg/L (ppb)
2/14/2024
Lithium
Detected: 31.1866 µg/L (ppb)
12/6/2023
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: 0.08 MG/L (ppm)
7/14/2025
Calculated Parameters
Values worked out mathematically from other test results, not measured directly
Alkalinity, Bicarbonate
Detected: 210 MG/L (ppm)
7/8/2025
Other
Additional substances tested that don't fit neatly into the categories above
Dibromoaceticacid
Detected: 1.03 UG/L (ppb)
3/10/2025
Alkalinity, Total
Detected: 162 MG/L (ppm)
8/25/2025
Silica
Detected: 21.5 MG/L (ppm)
7/14/2025
Carbon, Total
Detected: 0.05 MG/L (ppm)
7/14/2025
TDS
Detected: 350 MG/L (ppm)
7/14/2025
Perfluorohexanesulfonicacid (PFHxS)
Detected: 3.4 NG/L (ppt)
8/25/2025
Turbidity
Detected: 0.2 NTU
5/1/2025
A measure of water cloudiness from suspended particles.
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.