HIGHLANDS MUTUAL WATER COMPANY Water Quality Report
Serving roughly 7,772 people in Lake County, California.
Data current as of July 2026
🔍Straight from EPA
🧪Real Lab Results
📅Updated Quarterly
🏠Local Expertise
Results for HIGHLANDS MUTUAL WATER COMPANY
1 water provider directly on file, serving roughly 7,772 people in Lake County, California.
Quick answer: HIGHLANDS MUTUAL WATER COMPANY has no violations on file. One reading is worth knowing about: Alkalinity, Carbonate was measured at 52MG/L, among the highest of the 291 providers on file in this area. It's the most notable figure in this system's record among its 291 local peers.
Lead Summary
Lithium
Totalhaloaceticacids (HAA5)
TTHM
Chloroform
Bromodichloromethane
Dichloroaceticacid
Trichloroaceticacid
Dibromochloromethane
Aggressive Index
Magnesium
Sodium
Calcium
Alkalinity, Total
Alkalinity, Bicarbonate
Hardness, Total (ASCACO3)
Carbon, Total
TDS
Chloride
Sulfate
Fluoride
pH
Odor
Boron, Total
Conductivity (at 25°C)
Color
Alkalinity, Carbonate
Turbidity
Radium-228
Combined Radium (-226 & -228)
Iron
Manganese
Aluminum
Utility HIGHLANDS MUTUAL WATER COMPANYPopulation served 7,772Owner Private
No violations on file
Contaminants found
Metals
Naturally occurring or corrosion-related elements, e.g. lead, arsenic, copper
Lead Summary
Detected: 0.0046 mg/L (ppm)
12/31/2023
Iron
Detected: 330 UG/L (ppb)
6/10/2025
Mostly an aesthetic issue (metallic taste, staining) rather than a health concern at typical levels.
Manganese
Detected: 54 UG/L (ppb)
6/10/2025
Mainly a taste/staining concern at typical levels; long-term neurological research at high chronic exposure is ongoing.
Aluminum
Detected: 250 UG/L (ppb)
6/10/2025
Disinfection Byproducts
Formed when chlorine used to disinfect water reacts with organic matter
Totalhaloaceticacids (HAA5)
Detected: 23.2 UG/L (ppb)
5/14/2025
TTHM
Detected: 26.37 UG/L (ppb)
5/14/2025
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: 22.88 UG/L (ppb)
5/14/2025
One of the individual trihalomethane disinfection byproducts, formed when chlorine reacts with organic matter.
Bromodichloromethane
Detected: 3.49 UG/L (ppb)
5/14/2025
Dibromochloromethane
Detected: 1.3 UG/L (ppb)
2/12/2025
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Chloride
Detected: 14 MG/L (ppm)
6/10/2025
Sulfate
Detected: 6.6 MG/L (ppm)
6/10/2025
Fluoride
Detected: 0.1 MG/L (ppm)
6/10/2025
Often added deliberately for dental health; can also occur naturally.
Boron, Total
Detected: 980 UG/L (ppb)
6/10/2025
Minerals
Everyday minerals that mainly affect taste and water hardness
Magnesium
Detected: 16 MG/L (ppm)
6/10/2025
Sodium
Detected: 14 MG/L (ppm)
6/10/2025
Calcium
Detected: 22 MG/L (ppm)
6/10/2025
Properties
General water characteristics like pH, hardness, and cloudiness (turbidity)
Hardness, Total (ASCACO3)
Detected: 121 MG/L (ppm)
6/10/2025
pH
Detected: 7.65 PH
6/10/2025
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: 25 µg/L (ppb)
11/5/2024
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: 140 MG/L (ppm)
10/1/2025
Alkalinity, Carbonate
Detected: 52 MG/L (ppm)
8/6/2025
Other
Additional substances tested that don't fit neatly into the categories above
Dichloroaceticacid
Detected: 12.2 UG/L (ppb)
5/14/2025
Trichloroaceticacid
Detected: 11 UG/L (ppb)
5/14/2025
Aggressive Index
Detected: 11.5 AGGR
6/10/2025
Alkalinity, Total
Detected: 140 MG/L (ppm)
10/1/2025
Carbon, Total
Detected: 2.64 MG/L (ppm)
10/1/2025
TDS
Detected: 150 MG/L (ppm)
6/10/2025
Odor
Detected: 7.1 TON
6/10/2025
Conductivity (at 25°C)
Detected: 290 UMHO/CM
6/10/2025
Color
Detected: 13 UNITS
6/10/2025
Turbidity
Detected: 9.4 NTU
6/10/2025
A measure of water cloudiness from suspended particles.
Radium-228
Detected: 0.774 PCI/L
8/20/2025
Combined Radium (-226 & -228)
Detected: 0.797 PCI/L
8/20/2025
A naturally occurring radioactive element found in some groundwater.
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.