Serving roughly 148,496 people in Tulare County, California.
Data current as of July 2026
🔍Straight from EPA
🧪Real Lab Results
📅Updated Quarterly
🏠Local Expertise
Results for CWS - VISALIA
1 water provider directly on file, serving roughly 148,496 people in Tulare County, California.
Quick answer: CWS - VISALIA has no violations on file. One reading is worth knowing about: Turbidity was measured at 3.8NTU, among the highest of the 713 providers on file in this area. It's the most notable figure in this system's record among its 713 local peers.
Lead Summary
PFBS
PFOS
PFOA
PFHXA
PFPEA
PFBA
Aggressive Index
Langelier Index (pH(s))
Magnesium
Calcium
Sodium
Silica
Alkalinity, Total
Alkalinity, Bicarbonate
Hardness, Total (ASCACO3)
TDS
Chloride
Sulfate
Potassium
Fluoride
Nitrate-Nitrite
Nitrate
Perfluorohexanesulfonicacid (PFHxS)
Perfluoroctanesulfonicacid (PFOS)
Perfluoropentanoicacid (PFPEA)
Perfluorobutanesulfonicacid (PFBS)
Perfluoroctanoicacid (PFOA)
Perfluorohexanoicacid (PFHXA)
Perfluoroheptanoicacid (PFHPA)
Turbidity
Combined Uranium
Gross Alpha Particle Activity
pH, Field
Strontium
Acetone
Iron
Manganese
TTHM
1, 2, 3-Trichloropropane
1, 2-Dibromo-3-Chloropropane
Chromium, Hex
Tetrachloroethylene
Chloroform
Bromodichloromethane
Dibromochloromethane
Barium
Aluminum
Conductivity (at 25°C)
Color
Lead
Utility CWS - VISALIAPopulation served 148,496Owner Private
No violations on file
Contaminants found
Metals
Naturally occurring or corrosion-related elements, e.g. lead, arsenic, copper
Lead Summary
Detected: 0 mg/L (ppm)
12/31/2025
Combined Uranium
Detected: 3 PCI/L
6/12/2025
A naturally occurring radioactive metal. Long-term exposure above the legal limit is associated with kidney effects and increased cancer risk.
Strontium
Detected: 500 UG/L (ppb)
10/21/2025
Iron
Detected: 630 UG/L (ppb)
10/21/2025
Mostly an aesthetic issue (metallic taste, staining) rather than a health concern at typical levels.
Manganese
Detected: 16 UG/L (ppb)
10/21/2025
Mainly a taste/staining concern at typical levels; long-term neurological research at high chronic exposure is ongoing.
Chromium, Hex
Detected: 0.73 UG/L (ppb)
10/21/2025
Barium
Detected: 67 UG/L (ppb)
10/21/2025
Aluminum
Detected: 100 UG/L (ppb)
10/21/2025
Lead
Detected: 1.2 UG/L (ppb)
7/30/2025
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.
Disinfection Byproducts
Formed when chlorine used to disinfect water reacts with organic matter
TTHM
Detected: 4.1 UG/L (ppb)
4/1/2025
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: 1.2 UG/L (ppb)
7/21/2025
One of the individual trihalomethane disinfection byproducts, formed when chlorine reacts with organic matter.
Bromodichloromethane
Detected: 0.8 UG/L (ppb)
1/14/2025
Dibromochloromethane
Detected: 0.7 UG/L (ppb)
1/14/2025
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Chloride
Detected: 15 MG/L (ppm)
10/21/2025
Sulfate
Detected: 10 MG/L (ppm)
10/21/2025
Fluoride
Detected: 0.1 MG/L (ppm)
8/20/2025
Often added deliberately for dental health; can also occur naturally.
Nitrate-Nitrite
Detected: 3.4 MG/L (ppm)
10/21/2025
Nitrate
Detected: 3.4 MG/L (ppm)
10/21/2025
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: 2.1 MG/L (ppm)
10/21/2025
Calcium
Detected: 54 MG/L (ppm)
10/21/2025
Sodium
Detected: 15 MG/L (ppm)
10/21/2025
Potassium
Detected: 1.2 MG/L (ppm)
8/18/2025
Properties
General water characteristics like pH, hardness, and cloudiness (turbidity)
Langelier Index (pH(s))
Detected: -0.19 LANG
10/21/2025
Hardness, Total (ASCACO3)
Detected: 140 MG/L (ppm)
10/21/2025
Gross Alpha Particle Activity
Detected: 3.73 PCI/L
3/21/2025
pH, Field
Detected: 7.6 PH
10/21/2025
PFAS & Emerging Contaminants
Human-made "forever chemicals" and other substances not yet fully regulated
PFBS
Detected: 0.0033 µg/L (ppb)
12/7/2024
PFOS
Detected: 0.0042 µg/L (ppb)
10/16/2024
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
PFOA
Detected: 0.0042 µg/L (ppb)
3/12/2024
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
PFHXA
Detected: 0.015 µg/L (ppb)
12/7/2024
PFPEA
Detected: 0.034 µg/L (ppb)
6/16/2024
PFBA
Detected: 0.028 µg/L (ppb)
12/7/2024
VOCs (Volatile Organic Compounds)
Industrial solvents and fuel-related chemicals that evaporate easily
1, 2, 3-Trichloropropane
Detected: 0.028 UG/L (ppb)
9/15/2025
Tetrachloroethylene
Detected: 1.1 UG/L (ppb)
9/21/2025
Calculated Parameters
Values worked out mathematically from other test results, not measured directly
Alkalinity, Bicarbonate
Detected: 120 MG/L (ppm)
10/21/2025
Other
Additional substances tested that don't fit neatly into the categories above
Aggressive Index
Detected: 11.8 AGGR
10/21/2025
Silica
Detected: 17 MG/L (ppm)
6/12/2025
Alkalinity, Total
Detected: 120 MG/L (ppm)
10/21/2025
TDS
Detected: 220 MG/L (ppm)
10/21/2025
Perfluorohexanesulfonicacid (PFHxS)
Detected: 2.3 NG/L (ppt)
8/16/2025
Perfluoroctanesulfonicacid (PFOS)
Detected: 2.8 NG/L (ppt)
10/1/2025
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
Perfluoropentanoicacid (PFPEA)
Detected: 3.1 NG/L (ppt)
8/16/2025
Perfluorobutanesulfonicacid (PFBS)
Detected: 2.7 NG/L (ppt)
8/16/2025
Perfluoroctanoicacid (PFOA)
Detected: 3.5 NG/L (ppt)
8/16/2025
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
Perfluorohexanoicacid (PFHXA)
Detected: 2.2 NG/L (ppt)
10/21/2025
Perfluoroheptanoicacid (PFHPA)
Detected: 2.1 NG/L (ppt)
5/29/2025
Turbidity
Detected: 3.8 NTU
10/21/2025
A measure of water cloudiness from suspended particles.
Acetone
Detected: 15 UG/L (ppb)
4/2/2025
1, 2-Dibromo-3-Chloropropane
Detected: 0.099 UG/L (ppb)
10/8/2025
Conductivity (at 25°C)
Detected: 350 UMHO/CM
10/21/2025
Color
Detected: 5 UNITS
10/21/2025
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.