SOMIS is served by 1 water provider on file with the EPA.
Data current as of July 2026
🔍Straight from EPA
🧪Real Lab Results
📅Updated Quarterly
🏠Local Expertise
Results for SOMIS, CA
1 water provider on file serving this city.
Quick answer: SOMIS's water has no violations on file and no single reading stands out against its peers (1 other providers in this area). It serves roughly 1,429 people, and the full breakdown below reflects everything EPA and California have on record for it.
Lead Summary
Iron
Manganese
Aggressive Index
Langelier Index (pH(s))
Magnesium
Potassium
Sodium
Hardness, Total (ASCACO3)
Calcium
Alkalinity, Total
Alkalinity, Bicarbonate
TDS
Chloride
Sulfate
Fluoride
Turbidity
pH, Field
Odor
Boron, Total
Selenium
Conductivity (at 25°C)
Color
Totalhaloaceticacids (HAA5)
TTHM
Chloroform
Bromoform
Bromodichloromethane
Dibromochloromethane
Dichloroaceticacid
Trichloroaceticacid
Monobromoaceticacid
Dibromoaceticacid
Monochloroaceticacid
Contaminants found
Metals
Naturally occurring or corrosion-related elements, e.g. lead, arsenic, copper
Lead Summary
Detected: 0 mg/L (ppm)
12/31/2021
Iron
Detected: 240 UG/L (ppb)
10/15/2025
Mostly an aesthetic issue (metallic taste, staining) rather than a health concern at typical levels.
Manganese
Detected: 130 UG/L (ppb)
10/15/2025
Mainly a taste/staining concern at typical levels; long-term neurological research at high chronic exposure is ongoing.
Selenium
Detected: 6 UG/L (ppb)
8/6/2025
Disinfection Byproducts
Formed when chlorine used to disinfect water reacts with organic matter
Totalhaloaceticacids (HAA5)
Detected: 6 UG/L (ppb)
8/7/2025
TTHM
Detected: 4 UG/L (ppb)
8/7/2025
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: 9 UG/L (ppb)
5/7/2025
One of the individual trihalomethane disinfection byproducts, formed when chlorine reacts with organic matter.
Bromoform
Detected: 1 UG/L (ppb)
8/7/2025
Bromodichloromethane
Detected: 1 UG/L (ppb)
8/7/2025
Dibromochloromethane
Detected: 2 UG/L (ppb)
8/7/2025
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Chloride
Detected: 16 MG/L (ppm)
8/6/2025
Sulfate
Detected: 188 MG/L (ppm)
8/6/2025
Fluoride
Detected: 0.3 MG/L (ppm)
8/6/2025
Often added deliberately for dental health; can also occur naturally.
Boron, Total
Detected: 200 UG/L (ppb)
8/6/2025
Minerals
Everyday minerals that mainly affect taste and water hardness
Magnesium
Detected: 27 MG/L (ppm)
8/6/2025
Potassium
Detected: 5 MG/L (ppm)
8/6/2025
Sodium
Detected: 60 MG/L (ppm)
8/6/2025
Calcium
Detected: 75 MG/L (ppm)
8/6/2025
Properties
General water characteristics like pH, hardness, and cloudiness (turbidity)
Langelier Index (pH(s))
Detected: 0.3 LANG
8/6/2025
Hardness, Total (ASCACO3)
Detected: 298 MG/L (ppm)
8/6/2025
pH, Field
Detected: 7.58 PH
8/6/2025
Calculated Parameters
Values worked out mathematically from other test results, not measured directly
Alkalinity, Bicarbonate
Detected: 270 MG/L (ppm)
8/6/2025
Other
Additional substances tested that don't fit neatly into the categories above
Aggressive Index
Detected: 12.2 AGGR
8/6/2025
Alkalinity, Total
Detected: 220 MG/L (ppm)
8/6/2025
TDS
Detected: 590 MG/L (ppm)
8/6/2025
Turbidity
Detected: 0.8 NTU
8/6/2025
A measure of water cloudiness from suspended particles.
Odor
Detected: 8 TON
8/6/2025
Conductivity (at 25°C)
Detected: 851 UMHO/CM
8/6/2025
Color
Detected: 10 UNITS
8/6/2025
Dichloroaceticacid
Detected: 4 UG/L (ppb)
5/7/2025
Trichloroaceticacid
Detected: 1 UG/L (ppb)
8/7/2025
Monobromoaceticacid
Detected: 1 UG/L (ppb)
2/11/2025
Dibromoaceticacid
Detected: 5 UG/L (ppb)
8/7/2025
Monochloroaceticacid
Detected: 3 UG/L (ppb)
5/7/2025
Filtration considerations: General system types, not a specific product recommendation.