Serving roughly 4,527 people in Madera County, California.
Data current as of July 2026
🔍Straight from EPA
🧪Real Lab Results
📅Updated Quarterly
🏠Local Expertise
Results for CAL AM - BASS LAKE
1 water provider directly on file, serving roughly 4,527 people in Madera County, California.
Quick answer: CAL AM - BASS LAKE has no violations on file and no single reading stands out against its peers (311 other providers in this area). It serves roughly 4,527 people, and the full breakdown below reflects everything EPA and California have on record for it.
Lead Summary
Copper Summary
PFBA
Lithium
Lead
Totalhaloaceticacids (HAA5)
TTHM
Dichloroaceticacid
Trichloroaceticacid
Chloroform
Bromodichloromethane
Monochloroaceticacid
Copper, Free
Orthophosphate
Alkalinity, Total
Alkalinity, Bicarbonate
Combined Uranium
pH, Field
Chromium, Hex
Magnesium
Sodium
Calcium
Hardness, Total (ASCACO3)
TDS
Chloride
Sulfate
Potassium
Fluoride
Adsorbableorganicfluorine
Perfluorobutanesulfonicacid (PFBS)
Turbidity
pH
Odor
Manganese
Iron
Mercury
Nickel
Chromium
Barium
Arsenic
Zinc
Aluminum
Conductivity (at 25°C)
Color
Utility CAL AM - BASS LAKEPopulation served 4,527Owner Private
No violations on file
Contaminants found
Metals
Naturally occurring or corrosion-related elements, e.g. lead, arsenic, copper
Lead Summary
Detected: 0.002 mg/L (ppm)
12/31/2025
Copper Summary
Detected: 1.5 mg/L (ppm)
12/31/1999
Lead
Detected: 3 UG/L (ppb)
9/24/2025
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.
Copper, Free
Detected: 32 UG/L (ppb)
9/23/2025
Combined Uranium
Detected: 59 PCI/L
10/1/2025
A naturally occurring radioactive metal. Long-term exposure above the legal limit is associated with kidney effects and increased cancer risk.
Chromium, Hex
Detected: 0.043 UG/L (ppb)
2/26/2025
Manganese
Detected: 18 UG/L (ppb)
5/14/2025
Mainly a taste/staining concern at typical levels; long-term neurological research at high chronic exposure is ongoing.
Iron
Detected: 1000 UG/L (ppb)
8/8/2025
Mostly an aesthetic issue (metallic taste, staining) rather than a health concern at typical levels.
Mercury
Detected: 0.11 UG/L (ppb)
5/14/2025
Nickel
Detected: 1 UG/L (ppb)
5/14/2025
Chromium
Detected: 1 UG/L (ppb)
5/14/2025
Occurs in two forms — trivalent (an essential nutrient in trace amounts) and hexavalent (linked to increased cancer risk).
Barium
Detected: 3.7 UG/L (ppb)
5/14/2025
Arsenic
Detected: 6.4 UG/L (ppb)
5/14/2025
Occurs naturally in some groundwater. Long-term exposure above the legal limit (10 ppb) has been linked to increased cancer risk and cardiovascular disease.
Zinc
Detected: 61 UG/L (ppb)
5/14/2025
Aluminum
Detected: 6.3 UG/L (ppb)
5/14/2025
Disinfection Byproducts
Formed when chlorine used to disinfect water reacts with organic matter
Totalhaloaceticacids (HAA5)
Detected: 53 UG/L (ppb)
8/6/2025
TTHM
Detected: 46 UG/L (ppb)
8/6/2025
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: 45 UG/L (ppb)
8/6/2025
One of the individual trihalomethane disinfection byproducts, formed when chlorine reacts with organic matter.
Bromodichloromethane
Detected: 1.1 UG/L (ppb)
8/6/2025
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Chloride
Detected: 2.3 MG/L (ppm)
5/14/2025
Sulfate
Detected: 5.9 MG/L (ppm)
5/14/2025
Fluoride
Detected: 0.43 MG/L (ppm)
5/14/2025
Often added deliberately for dental health; can also occur naturally.
Minerals
Everyday minerals that mainly affect taste and water hardness
Magnesium
Detected: 3.1 MG/L (ppm)
8/18/2025
Sodium
Detected: 18 MG/L (ppm)
5/14/2025
Calcium
Detected: 28 MG/L (ppm)
8/18/2025
Potassium
Detected: 2.4 MG/L (ppm)
5/14/2025
Properties
General water characteristics like pH, hardness, and cloudiness (turbidity)
Orthophosphate
Detected: 0.93 MG/L (ppm)
10/22/2025
pH, Field
Detected: 7.5 PH
10/22/2025
Hardness, Total (ASCACO3)
Detected: 82 MG/L (ppm)
8/18/2025
pH
Detected: 7.1 PH
5/14/2025
A measure of how acidic or basic the water is (7 is neutral). Affects taste and plumbing, not a direct health measure.
PFAS & Emerging Contaminants
Human-made "forever chemicals" and other substances not yet fully regulated
PFBA
Detected: 0.0075 µg/L (ppb)
2/26/2025
Lithium
Detected: 51.2 µg/L (ppb)
9/17/2025
Occurs naturally in some groundwater. Not currently federally regulated in drinking water.
Calculated Parameters
Values worked out mathematically from other test results, not measured directly
Alkalinity, Bicarbonate
Detected: 97 MG/L (ppm)
10/22/2025
Other
Additional substances tested that don't fit neatly into the categories above
Dichloroaceticacid
Detected: 21 UG/L (ppb)
8/6/2025
Trichloroaceticacid
Detected: 30 UG/L (ppb)
8/6/2025
Monochloroaceticacid
Detected: 2.2 UG/L (ppb)
8/6/2025
Alkalinity, Total
Detected: 97 MG/L (ppm)
10/22/2025
TDS
Detected: 140 MG/L (ppm)
5/14/2025
Adsorbableorganicfluorine
Detected: 1600 NG/L (ppt)
8/7/2025
Perfluorobutanesulfonicacid (PFBS)
Detected: 2.7 NG/L (ppt)
8/7/2025
Turbidity
Detected: 14 NTU
8/8/2025
A measure of water cloudiness from suspended particles.
Odor
Detected: 1 TON
5/14/2025
Conductivity (at 25°C)
Detected: 240 UMHO/CM
5/14/2025
Color
Detected: 30 UNITS
8/8/2025
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.