Serving roughly 80,969 people in Sacramento County, California.
Data current as of July 2026
🔍Straight from EPA
🧪Real Lab Results
📅Updated Quarterly
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Results for FOLSOM, CITY OF - MAIN
1 water provider directly on file, serving roughly 80,969 people in Sacramento County, California.
Quick answer: FOLSOM, CITY OF - MAIN has no violations on file. One reading is worth knowing about: Chloroform was measured at 52UG/L, among the highest of the 467 providers on file in this area. It's the most notable figure in this system's record among its 467 local peers.
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
Utility FOLSOM, CITY OF - MAINPopulation served 80,969Owner Local government
Naturally occurring or corrosion-related elements, e.g. lead, arsenic, copper
Lead Summary
Detected: 0 mg/L (ppm)
12/31/2023
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: 28 UG/L (ppb)
10/15/2025
TTHM
Detected: 55 UG/L (ppb)
10/15/2025
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: 52 UG/L (ppb)
10/15/2025
One of the individual trihalomethane disinfection byproducts, formed when chlorine reacts with organic matter.
Bromodichloromethane
Detected: 2.9 UG/L (ppb)
10/15/2025
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Chloride
Detected: 4.8 MG/L (ppm)
7/9/2025
Sulfate
Detected: 1.9 MG/L (ppm)
7/9/2025
Minerals
Everyday minerals that mainly affect taste and water hardness
Magnesium
Detected: 1.7 MG/L (ppm)
7/9/2025
Calcium
Detected: 6.5 MG/L (ppm)
7/9/2025
Sodium
Detected: 4.7 MG/L (ppm)
7/9/2025
Properties
General water characteristics like pH, hardness, and cloudiness (turbidity)
Langelier Index (pH(s))
Detected: -1.6 LANG
7/9/2025
Hardness, Total (ASCACO3)
Detected: 23 MG/L (ppm)
7/9/2025
pH
Detected: 7.8 PH
7/9/2025
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)
10/15/2025
Other
Additional substances tested that don't fit neatly into the categories above
Dichloroaceticacid
Detected: 11 UG/L (ppb)
10/15/2025
Trichloroaceticacid
Detected: 17 UG/L (ppb)
10/15/2025
Monochloroaceticacid
Detected: 2.1 UG/L (ppb)
10/15/2025
Aggressive Index
Detected: 10.4 AGGR
7/9/2025
Alkalinity, Total
Detected: 23 MG/L (ppm)
10/15/2025
Carbon, Total
Detected: 1.3 MG/L (ppm)
10/15/2025
TDS
Detected: 77 MG/L (ppm)
7/9/2025
Turbidity
Detected: 1.2 NTU
7/2/2025
A measure of water cloudiness from suspended particles.
Odor
Detected: 3.7 TON
7/9/2025
Conductivity (at 25°C)
Detected: 71 UMHO/CM
7/9/2025
Color
Detected: 10 UNITS
7/2/2025
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.