Serving roughly 49,934 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 GLENDORA-CITY, WATER DEPT.
1 water provider directly on file, serving roughly 49,934 people in Los Angeles County, California.
Quick answer: GLENDORA-CITY, WATER DEPT. has no violations on file. One reading is worth knowing about: Dibromochloromethane was measured at 21UG/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
Lead
Totalhaloaceticacids (HAA5)
TTHM
Chloroform
Bromoform
Bromodichloromethane
Dibromochloromethane
Dichloroaceticacid
Dibromoaceticacid
Monobromoaceticacid
Trichloroaceticacid
Copper, Free
Nitrate
Magnesium
Potassium
Sodium
Calcium
Hardness, Total (ASCACO3)
Alkalinity, Total
Alkalinity, Bicarbonate
TDS
Sulfate
Chloride
Utility GLENDORA-CITY, WATER DEPT.Population served 49,934Owner Local government
Naturally occurring or corrosion-related elements, e.g. lead, arsenic, copper
Lead Summary
Detected: 0 mg/L (ppm)
12/31/2025
Lead
Detected: 8.1 UG/L (ppb)
9/9/2025
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: 150 UG/L (ppb)
9/23/2025
Disinfection Byproducts
Formed when chlorine used to disinfect water reacts with organic matter
Totalhaloaceticacids (HAA5)
Detected: 7 UG/L (ppb)
10/23/2025
TTHM
Detected: 50 UG/L (ppb)
10/23/2025
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: 4 UG/L (ppb)
10/23/2025
One of the individual trihalomethane disinfection byproducts, formed when chlorine reacts with organic matter.
Bromoform
Detected: 14 UG/L (ppb)
10/23/2025
Bromodichloromethane
Detected: 11 UG/L (ppb)
10/23/2025
Dibromochloromethane
Detected: 21 UG/L (ppb)
10/23/2025
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Nitrate
Detected: 0.4 MG/L (ppm)
9/30/2025
Commonly from agricultural fertilizer runoff or septic systems. Above the legal limit, it's an immediate concern especially for infants.
Sulfate
Detected: 30 MG/L (ppm)
6/3/2025
Chloride
Detected: 32 MG/L (ppm)
6/3/2025
Minerals
Everyday minerals that mainly affect taste and water hardness
Magnesium
Detected: 11 MG/L (ppm)
6/3/2025
Potassium
Detected: 4.3 MG/L (ppm)
6/3/2025
Sodium
Detected: 33 MG/L (ppm)
6/3/2025
Calcium
Detected: 38 MG/L (ppm)
6/3/2025
Properties
General water characteristics like pH, hardness, and cloudiness (turbidity)
Hardness, Total (ASCACO3)
Detected: 140 MG/L (ppm)
6/3/2025
Calculated Parameters
Values worked out mathematically from other test results, not measured directly
Alkalinity, Bicarbonate
Detected: 170 MG/L (ppm)
6/3/2025
Other
Additional substances tested that don't fit neatly into the categories above
Dichloroaceticacid
Detected: 1.2 UG/L (ppb)
10/23/2025
Dibromoaceticacid
Detected: 3.2 UG/L (ppb)
10/23/2025
Monobromoaceticacid
Detected: 1 UG/L (ppb)
4/25/2025
Trichloroaceticacid
Detected: 1 UG/L (ppb)
10/23/2025
Alkalinity, Total
Detected: 140 MG/L (ppm)
6/3/2025
TDS
Detected: 280 MG/L (ppm)
7/14/2025
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.