Serving roughly 4,861 people in Santa Barbara County, California.
Data current as of July 2026
🔍Straight from EPA
🧪Real Lab Results
📅Updated Quarterly
🏠Local Expertise
Results for LA CUMBRE MUTUAL WATER CO
1 water provider directly on file, serving roughly 4,861 people in Santa Barbara County, California.
Quick answer: LA CUMBRE MUTUAL WATER CO has no violations on file and no single reading stands out against its peers (255 other providers in this area). It serves roughly 4,861 people, and the full breakdown below reflects everything EPA and California have on record for it.
Lead Summary
Lithium
Iron
Manganese
Aggressive Index
Langelier Index (pH(s))
Langelier Index (Source Temp.)
TDS
Calcium
Alkalinity, Total
Nitrate
Radium-228
Radium-226
Combined Uranium
Combined Radium (-226 & -228)
Gross Alpha Particle Activity
pH
Odor
Perchlorate
Conductivity (at 25°C)
Carbon, Total
Totalhaloaceticacids (HAA5)
TTHM
Chloroform
Bromoform
Bromodichloromethane
Dibromochloromethane
Dichloroaceticacid
Trichloroaceticacid
Dibromoaceticacid
Utility LA CUMBRE MUTUAL WATER COPopulation served 4,861Owner 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)
12/31/2023
Iron
Detected: 140 UG/L (ppb)
10/6/2025
Mostly an aesthetic issue (metallic taste, staining) rather than a health concern at typical levels.
Manganese
Detected: 120 UG/L (ppb)
10/6/2025
Mainly a taste/staining concern at typical levels; long-term neurological research at high chronic exposure is ongoing.
Combined Uranium
Detected: 2.4 PCI/L
5/28/2025
A naturally occurring radioactive metal. Long-term exposure above the legal limit is associated with kidney effects and increased cancer risk.
Disinfection Byproducts
Formed when chlorine used to disinfect water reacts with organic matter
Totalhaloaceticacids (HAA5)
Detected: 8.6 UG/L (ppb)
9/3/2025
TTHM
Detected: 29.3 UG/L (ppb)
9/3/2025
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: 1.5 UG/L (ppb)
9/3/2025
One of the individual trihalomethane disinfection byproducts, formed when chlorine reacts with organic matter.
Bromoform
Detected: 9.9 UG/L (ppb)
9/3/2025
Bromodichloromethane
Detected: 5.5 UG/L (ppb)
9/3/2025
Dibromochloromethane
Detected: 12.4 UG/L (ppb)
9/3/2025
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Nitrate
Detected: 4.1 MG/L (ppm)
9/3/2025
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
Calcium
Detected: 130 MG/L (ppm)
6/2/2025
Properties
General water characteristics like pH, hardness, and cloudiness (turbidity)
Langelier Index (pH(s))
Detected: 0.83 LANG
6/2/2025
Gross Alpha Particle Activity
Detected: 3.1 PCI/L
6/2/2025
pH
Detected: 7.1 PH
6/2/2025
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
Lithium
Detected: 40.2 µg/L (ppb)
6/4/2024
Occurs naturally in some groundwater. Not currently federally regulated in drinking water.
Other
Additional substances tested that don't fit neatly into the categories above
Aggressive Index
Detected: 12.09 AGGR
6/2/2025
Langelier Index (Source Temp.)
Detected: 0.23 LANG
6/2/2025
TDS
Detected: 930 MG/L (ppm)
9/3/2025
Alkalinity, Total
Detected: 290 MG/L (ppm)
6/2/2025
Radium-228
Detected: 0.124 PCI/L
9/3/2025
Radium-226
Detected: 0.518 PCI/L
9/3/2025
Combined Radium (-226 & -228)
Detected: 0.794 PCI/L
9/3/2025
A naturally occurring radioactive element found in some groundwater.
Odor
Detected: 1 TON
6/2/2025
Perchlorate
Detected: 2.5 UG/L (ppb)
6/2/2025
Can occur naturally or from industrial/military sources; may interfere with thyroid function at elevated levels.
Conductivity (at 25°C)
Detected: 1200 UMHO/CM
9/3/2025
Carbon, Total
Detected: 0.61 MG/L (ppm)
9/3/2025
Dichloroaceticacid
Detected: 2.6 UG/L (ppb)
9/3/2025
Trichloroaceticacid
Detected: 2.1 UG/L (ppb)
9/3/2025
Dibromoaceticacid
Detected: 3.9 UG/L (ppb)
9/3/2025
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.