WASCO is served by 3 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 WASCO, CA
3 water providers on file serving this city.
Quick answer: WASCO's water has no violations on file and no single reading stands out against its peers (3 other providers in this area). It serves roughly 22,757 people, and the full breakdown below reflects everything EPA and California have on record for it.
Lead Summary
Totalhaloaceticacids (HAA5)
TTHM
Chloroform
Bromoform
Dibromochloromethane
Dichloroaceticacid
Trichloroaceticacid
Dibromoaceticacid
Nitrate-Nitrite
Nitrate
Gross Alpha Particle Activity
Iron
Chromium, Hex
Selenium
Copper Summary
Bromodichloromethane
Monobromoaceticacid
Arsenic
Aggressive Index
Langelier Index (pH(s))
Alkalinity, Total
Alkalinity, Bicarbonate
Magnesium
Calcium
Sodium
Hardness, Total (ASCACO3)
TDS
Chloride
Sulfate
Radium-228
pH
Lead
1, 2, 3-Trichloropropane
1, 2-Dibromo-3-Chloropropane
Barium
Copper, Free
Conductivity (at 25°C)
Contaminants found
Metals
Naturally occurring or corrosion-related elements, e.g. lead, arsenic, copper
Lead Summary
Detected: 0 mg/L (ppm)
Found at 3 providers
Iron
Detected: 210 UG/L (ppb)
10/6/2025
Mostly an aesthetic issue (metallic taste, staining) rather than a health concern at typical levels.
Chromium, Hex
Detected: 8.3 UG/L (ppb)
Found at 2 providers
Selenium
Detected: 2.2 UG/L (ppb)
6/3/2025
Copper Summary
Detected: 1.4 mg/L (ppm)
12/31/2021
Arsenic
Detected: 2.5 UG/L (ppb)
Found at 2 providers
Occurs naturally in some groundwater. Long-term exposure above the legal limit (10 ppb) has been linked to increased cancer risk and cardiovascular disease.
Lead
Detected: 20 UG/L (ppb)
8/14/2025
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.
Barium
Detected: 61 UG/L (ppb)
10/9/2025
Copper, Free
Detected: 740 UG/L (ppb)
8/14/2025
Disinfection Byproducts
Formed when chlorine used to disinfect water reacts with organic matter
Totalhaloaceticacids (HAA5)
Detected: 9.3 UG/L (ppb)
Found at 2 providers
TTHM
Detected: 59 UG/L (ppb)
Found at 3 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: 3.1 UG/L (ppb)
Found at 2 providers
One of the individual trihalomethane disinfection byproducts, formed when chlorine reacts with organic matter.
Bromoform
Detected: 30 UG/L (ppb)
Found at 3 providers
Dibromochloromethane
Detected: 19 UG/L (ppb)
Found at 3 providers
Bromodichloromethane
Detected: 6.8 UG/L (ppb)
Found at 2 providers
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Nitrate-Nitrite
Detected: 7.6 MG/L (ppm)
Found at 2 providers
Nitrate
Detected: 7.6 MG/L (ppm)
Found at 2 providers
Commonly from agricultural fertilizer runoff or septic systems. Above the legal limit, it's an immediate concern especially for infants.
Chloride
Detected: 14 MG/L (ppm)
8/14/2025
Sulfate
Detected: 29 MG/L (ppm)
8/14/2025
Minerals
Everyday minerals that mainly affect taste and water hardness
Magnesium
Detected: 0.58 MG/L (ppm)
10/9/2025
Calcium
Detected: 38 MG/L (ppm)
10/9/2025
Sodium
Detected: 32 MG/L (ppm)
10/9/2025
Properties
General water characteristics like pH, hardness, and cloudiness (turbidity)
Gross Alpha Particle Activity
Detected: 1.33 PCI/L
Found at 2 providers
Langelier Index (pH(s))
Detected: -1 LANG
8/14/2025
Hardness, Total (ASCACO3)
Detected: 98 MG/L (ppm)
10/9/2025
pH
Detected: 7.4 PH
8/14/2025
A measure of how acidic or basic the water is (7 is neutral). Affects taste and plumbing, not a direct health measure.
VOCs (Volatile Organic Compounds)
Industrial solvents and fuel-related chemicals that evaporate easily
1, 2, 3-Trichloropropane
Detected: 0.035 UG/L (ppb)
10/7/2025
Calculated Parameters
Values worked out mathematically from other test results, not measured directly
Alkalinity, Bicarbonate
Detected: 62 MG/L (ppm)
8/14/2025
Other
Additional substances tested that don't fit neatly into the categories above
Dichloroaceticacid
Detected: 2.5 UG/L (ppb)
Found at 2 providers
Trichloroaceticacid
Detected: 1.7 UG/L (ppb)
6/17/2025
Dibromoaceticacid
Detected: 4.7 UG/L (ppb)
Found at 3 providers
Monobromoaceticacid
Detected: 2.1 UG/L (ppb)
6/3/2025
Aggressive Index
Detected: 11 AGGR
8/14/2025
Alkalinity, Total
Detected: 62 MG/L (ppm)
8/14/2025
TDS
Detected: 190 MG/L (ppm)
8/14/2025
Radium-228
Detected: 0.49 PCI/L
7/10/2025
1, 2-Dibromo-3-Chloropropane
Detected: 0.013 UG/L (ppb)
10/9/2025
Conductivity (at 25°C)
Detected: 350 UMHO/CM
10/9/2025
Filtration considerations: General system types, not a specific product recommendation.