FOLSOM is served by 2 water providers on file with the EPA.
Data current as of July 2026
🔍Straight from EPA
🧪Real Lab Results
📅Updated Quarterly
🏠Local Expertise
Results for FOLSOM, CA
2 water providers on file serving this city.
Quick answer: FOLSOM's water has no violations on file and no single reading stands out against its peers (2 other providers in this area). It serves roughly 80,969 people, and the full breakdown below reflects everything EPA and California have on record for it.
Lead Summary
Totalhaloaceticacids (HAA5)
TTHM
Chloroform
Bromodichloromethane
Dichloroaceticacid
Trichloroaceticacid
Monochloroaceticacid
Aggressive Index
Langelier Index (pH(s))
Magnesium
Calcium
Sodium
Alkalinity, Total
Alkalinity, Bicarbonate
Hardness, Total (ASCACO3)
Carbon, Total
TDS
Chloride
Sulfate
Turbidity
pH
Odor
Conductivity (at 25°C)
Chromium, Hex
Color
Foamingagents (SURFACTANTS)
Contaminants found
Metals
Naturally occurring or corrosion-related elements, e.g. lead, arsenic, copper
Lead Summary
Detected: 0 mg/L (ppm)
Found at 2 providers
Chromium, Hex
Detected: 0.11 UG/L (ppb)
7/2/2025
Disinfection Byproducts
Formed when chlorine used to disinfect water reacts with organic matter
Totalhaloaceticacids (HAA5)
Detected: 30 UG/L (ppb)
Found at 2 providers
TTHM
Detected: 55 UG/L (ppb)
Found at 2 providers
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: 52 UG/L (ppb)
Found at 2 providers
One of the individual trihalomethane disinfection byproducts, formed when chlorine reacts with organic matter.
Bromodichloromethane
Detected: 2.9 UG/L (ppb)
Found at 2 providers
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Chloride
Detected: 4.8 MG/L (ppm)
Found at 2 providers
Sulfate
Detected: 4.9 MG/L (ppm)
Found at 2 providers
Minerals
Everyday minerals that mainly affect taste and water hardness
Magnesium
Detected: 1.7 MG/L (ppm)
Found at 2 providers
Calcium
Detected: 8.5 MG/L (ppm)
Found at 2 providers
Sodium
Detected: 4.7 MG/L (ppm)
Found at 2 providers
Properties
General water characteristics like pH, hardness, and cloudiness (turbidity)
Langelier Index (pH(s))
Detected: -1.6 LANG
Found at 2 providers
Hardness, Total (ASCACO3)
Detected: 28 MG/L (ppm)
Found at 2 providers
pH
Detected: 7.8 PH
Found at 2 providers
A measure of how acidic or basic the water is (7 is neutral). Affects taste and plumbing, not a direct health measure.
Calculated Parameters
Values worked out mathematically from other test results, not measured directly
Alkalinity, Bicarbonate
Detected: 23 MG/L (ppm)
Found at 2 providers
Other
Additional substances tested that don't fit neatly into the categories above
Dichloroaceticacid
Detected: 14 UG/L (ppb)
Found at 2 providers
Trichloroaceticacid
Detected: 17 UG/L (ppb)
Found at 2 providers
Monochloroaceticacid
Detected: 2.1 UG/L (ppb)
10/15/2025
Aggressive Index
Detected: 10.4 AGGR
Found at 2 providers
Alkalinity, Total
Detected: 23 MG/L (ppm)
Found at 2 providers
Carbon, Total
Detected: 1.3 MG/L (ppm)
10/15/2025
TDS
Detected: 77 MG/L (ppm)
Found at 2 providers
Turbidity
Detected: 1.2 NTU
7/2/2025
A measure of water cloudiness from suspended particles.
Odor
Detected: 11 TON
Found at 2 providers
Conductivity (at 25°C)
Detected: 71 UMHO/CM
Found at 2 providers
Color
Detected: 10 UNITS
7/2/2025
Foamingagents (SURFACTANTS)
Detected: 0.06 MG/L (ppm)
4/23/2025
Filtration considerations: General system types, not a specific product recommendation.