PARAMOUNT - CITY, WATER DEPT. Water Quality Report
Serving roughly 55,200 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 PARAMOUNT - CITY, WATER DEPT.
1 water provider directly on file, serving roughly 55,200 people in Los Angeles County, California.
Quick answer: PARAMOUNT - CITY, WATER DEPT. has no violations on file. One reading is worth knowing about: Radium-228 was measured at 1.91PCI/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
TTHM
Chloroform
Bromoform
Bromodichloromethane
Dibromochloromethane
Dichloroaceticacid
Dibromoaceticacid
Copper, Free
Manganese
Iron
Arsenic
Aggressive Index
Magnesium
Calcium
Potassium
Sodium
Hardness, Total (ASCACO3)
Alkalinity, Total
Alkalinity, Bicarbonate
TDS
Chloride
Sulfate
Carbon, Total
Fluoride
Nitrate-Nitrite
Nitrate
Perfluoroctanesulfonicacid (PFOS)
Turbidity
Radium-228
Combined Uranium
pH
1, 4-Dioxane
Chromium, Hex
Barium
Conductivity (at 25°C)
Color
Utility PARAMOUNT - CITY, WATER DEPT.Population served 55,200Owner Local government
Naturally occurring or corrosion-related elements, e.g. lead, arsenic, copper
Lead Summary
Detected: 0 mg/L (ppm)
12/31/2025
Copper, Free
Detected: 50 UG/L (ppb)
7/29/2025
Manganese
Detected: 31 UG/L (ppb)
9/16/2025
Mainly a taste/staining concern at typical levels; long-term neurological research at high chronic exposure is ongoing.
Iron
Detected: 200 UG/L (ppb)
9/30/2025
Mostly an aesthetic issue (metallic taste, staining) rather than a health concern at typical levels.
Arsenic
Detected: 7.5 UG/L (ppb)
9/30/2025
Occurs naturally in some groundwater. Long-term exposure above the legal limit (10 ppb) has been linked to increased cancer risk and cardiovascular disease.
Combined Uranium
Detected: 1.7 PCI/L
2/27/2025
A naturally occurring radioactive metal. Long-term exposure above the legal limit is associated with kidney effects and increased cancer risk.
Chromium, Hex
Detected: 0.086 UG/L (ppb)
2/27/2025
Barium
Detected: 160 UG/L (ppb)
7/7/2025
Disinfection Byproducts
Formed when chlorine used to disinfect water reacts with organic matter
TTHM
Detected: 7.7 UG/L (ppb)
7/15/2025
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: 1.5 UG/L (ppb)
7/15/2025
One of the individual trihalomethane disinfection byproducts, formed when chlorine reacts with organic matter.
Bromoform
Detected: 1.5 UG/L (ppb)
7/15/2025
Bromodichloromethane
Detected: 2 UG/L (ppb)
7/15/2025
Dibromochloromethane
Detected: 2.7 UG/L (ppb)
7/15/2025
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Chloride
Detected: 37 MG/L (ppm)
7/7/2025
Sulfate
Detected: 71 MG/L (ppm)
7/7/2025
Fluoride
Detected: 0.39 MG/L (ppm)
7/7/2025
Often added deliberately for dental health; can also occur naturally.
Nitrate-Nitrite
Detected: 0.41 MG/L (ppm)
7/7/2025
Nitrate
Detected: 0.41 MG/L (ppm)
7/7/2025
Commonly from agricultural fertilizer runoff or septic systems. Above the legal limit, it's an immediate concern especially for infants.
Minerals
Everyday minerals that mainly affect taste and water hardness
Magnesium
Detected: 11.4 MG/L (ppm)
7/7/2025
Calcium
Detected: 68 MG/L (ppm)
7/7/2025
Potassium
Detected: 3.4 MG/L (ppm)
7/7/2025
Sodium
Detected: 37 MG/L (ppm)
7/7/2025
Properties
General water characteristics like pH, hardness, and cloudiness (turbidity)
Hardness, Total (ASCACO3)
Detected: 217 MG/L (ppm)
7/7/2025
pH
Detected: 6.92 PH
7/7/2025
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: 17 µg/L (ppb)
8/4/2025
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: 270 MG/L (ppm)
7/7/2025
Other
Additional substances tested that don't fit neatly into the categories above
Dichloroaceticacid
Detected: 1.6 UG/L (ppb)
4/15/2025
Dibromoaceticacid
Detected: 1 UG/L (ppb)
4/15/2025
Aggressive Index
Detected: 11.5 AGGR
7/7/2025
Alkalinity, Total
Detected: 220 MG/L (ppm)
7/7/2025
TDS
Detected: 460 MG/L (ppm)
7/7/2025
Carbon, Total
Detected: 0.41 MG/L (ppm)
2/27/2025
Perfluoroctanesulfonicacid (PFOS)
Detected: 6.2 NG/L (ppt)
7/7/2025
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
Turbidity
Detected: 0.7 NTU
7/7/2025
A measure of water cloudiness from suspended particles.
Radium-228
Detected: 1.91 PCI/L
10/6/2025
1, 4-Dioxane
Detected: 1.7 UG/L (ppb)
7/7/2025
Conductivity (at 25°C)
Detected: 610 UMHO/CM
7/7/2025
Color
Detected: 3 UNITS
2/27/2025
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.