Serving roughly 19,100 people in Los Angeles County, California.
Data current as of July 2026
🔍Straight from EPA
🧪Real Lab Results
📅Updated Quarterly
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Results for QUARTZ HILL WATER DIST.
1 water provider directly on file, serving roughly 19,100 people in Los Angeles County, California.
Quick answer: QUARTZ HILL WATER DIST. has no violations on file. One reading is worth knowing about: Vanadium, Total was measured at 18UG/L, among the highest of the 601 providers on file in this area. It's the most notable figure in this system's record among its 601 local peers.
Lead Summary
Lithium
Totalhaloaceticacids (HAA5)
TTHM
Chloroform
Bromoform
Bromodichloromethane
Dibromochloromethane
Dichloroaceticacid
Trichloroaceticacid
Dibromoaceticacid
Copper, Free
Magnesium
Potassium
Sodium
Hardness, Total (ASCACO3)
Calcium
Alkalinity, Total
Alkalinity, Bicarbonate
TDS
Chloride
Sulfate
Fluoride
Nitrate
Nitrate-Nitrite
Turbidity
pH
Odor
Vanadium, Total
Boron, Total
Chromium, Hex
Perchlorate
Chromium
Arsenic
Conductivity (at 25°C)
Utility QUARTZ HILL WATER DIST.Population served 19,100Owner 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)
12/31/2025
Copper, Free
Detected: 270 UG/L (ppb)
9/16/2025
Vanadium, Total
Detected: 18 UG/L (ppb)
7/8/2025
Chromium, Hex
Detected: 12 UG/L (ppb)
8/5/2025
Chromium
Detected: 12 UG/L (ppb)
7/8/2025
Occurs in two forms — trivalent (an essential nutrient in trace amounts) and hexavalent (linked to increased cancer risk).
Arsenic
Detected: 3.5 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.
Disinfection Byproducts
Formed when chlorine used to disinfect water reacts with organic matter
Totalhaloaceticacids (HAA5)
Detected: 6.3 UG/L (ppb)
8/19/2025
TTHM
Detected: 17.1 UG/L (ppb)
8/19/2025
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.
Chloroform
Detected: 2.1 UG/L (ppb)
8/19/2025
One of the individual trihalomethane disinfection byproducts, formed when chlorine reacts with organic matter.
Bromoform
Detected: 2.2 UG/L (ppb)
8/19/2025
Bromodichloromethane
Detected: 5.2 UG/L (ppb)
8/19/2025
Dibromochloromethane
Detected: 7.6 UG/L (ppb)
8/19/2025
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Chloride
Detected: 17 MG/L (ppm)
7/8/2025
Sulfate
Detected: 34 MG/L (ppm)
7/8/2025
Fluoride
Detected: 0.45 MG/L (ppm)
7/8/2025
Often added deliberately for dental health; can also occur naturally.
Nitrate
Detected: 8.2 MG/L (ppm)
7/22/2025
Commonly from agricultural fertilizer runoff or septic systems. Above the legal limit, it's an immediate concern especially for infants.
Nitrate-Nitrite
Detected: 1.2 MG/L (ppm)
7/8/2025
Boron, Total
Detected: 160 UG/L (ppb)
7/8/2025
Minerals
Everyday minerals that mainly affect taste and water hardness
Magnesium
Detected: 2.5 MG/L (ppm)
7/8/2025
Potassium
Detected: 1.1 MG/L (ppm)
7/8/2025
Sodium
Detected: 62 MG/L (ppm)
7/8/2025
Calcium
Detected: 20 MG/L (ppm)
7/8/2025
Properties
General water characteristics like pH, hardness, and cloudiness (turbidity)
Hardness, Total (ASCACO3)
Detected: 60 MG/L (ppm)
7/8/2025
pH
Detected: 8.1 PH
7/8/2025
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
Lithium
Detected: 12.2 µg/L (ppb)
9/9/2025
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: 160 MG/L (ppm)
7/8/2025
Other
Additional substances tested that don't fit neatly into the categories above
Dichloroaceticacid
Detected: 2.4 UG/L (ppb)
8/19/2025
Trichloroaceticacid
Detected: 1.7 UG/L (ppb)
8/19/2025
Dibromoaceticacid
Detected: 2.2 UG/L (ppb)
8/19/2025
Alkalinity, Total
Detected: 130 MG/L (ppm)
7/8/2025
TDS
Detected: 250 MG/L (ppm)
7/8/2025
Turbidity
Detected: 0.19 NTU
7/8/2025
A measure of water cloudiness from suspended particles.
Odor
Detected: 1 TON
7/8/2025
Perchlorate
Detected: 1.5 UG/L (ppb)
1/7/2025
Can occur naturally or from industrial/military sources; may interfere with thyroid function at elevated levels.
Conductivity (at 25°C)
Detected: 390 UMHO/CM
7/8/2025
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.