LAKE COUNTY CSA 21 - NORTH LAKEPORT Water Quality Report
Serving roughly 4,046 people in Lake County, California.
Data current as of July 2026
🔍Straight from EPA
🧪Real Lab Results
📅Updated Quarterly
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Results for LAKE COUNTY CSA 21 - NORTH LAKEPORT
1 water provider directly on file, serving roughly 4,046 people in Lake County, California.
Quick answer: LAKE COUNTY CSA 21 - NORTH LAKEPORT has no violations on file. One reading is worth knowing about: Arsenic was measured at 6.9UG/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
TTHM
Totalhaloaceticacids (HAA5)
Chloroform
Bromodichloromethane
Dibromochloromethane
Dichloroaceticacid
Trichloroaceticacid
Dibromoaceticacid
Aggressive Index
Magnesium
Sodium
Calcium
Alkalinity, Total
Alkalinity, Bicarbonate
Hardness, Total (ASCACO3)
TDS
Chloride
Sulfate
Turbidity
pH
Odor
Manganese
Conductivity (at 25°C)
Fluoride
Boron, Total
Barium
Arsenic
Aluminum
Utility LAKE COUNTY CSA 21 - NORTH LAKEPORTPopulation served 4,046Owner Local government
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)
12/31/2024
Manganese
Detected: 86 UG/L (ppb)
10/7/2025
Mainly a taste/staining concern at typical levels; long-term neurological research at high chronic exposure is ongoing.
Barium
Detected: 120 UG/L (ppb)
9/4/2025
Arsenic
Detected: 6.9 UG/L (ppb)
9/4/2025
Occurs naturally in some groundwater. Long-term exposure above the legal limit (10 ppb) has been linked to increased cancer risk and cardiovascular disease.
Aluminum
Detected: 110 UG/L (ppb)
9/4/2025
Disinfection Byproducts
Formed when chlorine used to disinfect water reacts with organic matter
TTHM
Detected: 49.39 UG/L (ppb)
8/5/2025
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.
Totalhaloaceticacids (HAA5)
Detected: 23.3 UG/L (ppb)
8/5/2025
Chloroform
Detected: 38.33 UG/L (ppb)
8/5/2025
One of the individual trihalomethane disinfection byproducts, formed when chlorine reacts with organic matter.
Bromodichloromethane
Detected: 8.76 UG/L (ppb)
8/5/2025
Dibromochloromethane
Detected: 2.3 UG/L (ppb)
8/5/2025
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Chloride
Detected: 15 MG/L (ppm)
9/4/2025
Sulfate
Detected: 4.2 MG/L (ppm)
9/4/2025
Fluoride
Detected: 0.12 MG/L (ppm)
9/4/2025
Often added deliberately for dental health; can also occur naturally.
Boron, Total
Detected: 940 UG/L (ppb)
9/4/2025
Minerals
Everyday minerals that mainly affect taste and water hardness
Magnesium
Detected: 18 MG/L (ppm)
9/4/2025
Sodium
Detected: 12 MG/L (ppm)
9/4/2025
Calcium
Detected: 25 MG/L (ppm)
9/4/2025
Properties
General water characteristics like pH, hardness, and cloudiness (turbidity)
Hardness, Total (ASCACO3)
Detected: 136 MG/L (ppm)
9/4/2025
pH
Detected: 7.95 PH
9/4/2025
A measure of how acidic or basic the water is (7 is neutral). Affects taste and plumbing, not a direct health measure.
Calculated Parameters
Values worked out mathematically from other test results, not measured directly
Alkalinity, Bicarbonate
Detected: 140 MG/L (ppm)
9/4/2025
Other
Additional substances tested that don't fit neatly into the categories above
Dichloroaceticacid
Detected: 13.7 UG/L (ppb)
8/5/2025
Trichloroaceticacid
Detected: 8.5 UG/L (ppb)
8/5/2025
Dibromoaceticacid
Detected: 1.1 UG/L (ppb)
8/5/2025
Aggressive Index
Detected: 11.89 AGGR
9/4/2025
Alkalinity, Total
Detected: 140 MG/L (ppm)
9/4/2025
TDS
Detected: 200 MG/L (ppm)
9/4/2025
Turbidity
Detected: 0.55 NTU
9/4/2025
A measure of water cloudiness from suspended particles.
Odor
Detected: 14 TON
9/4/2025
Conductivity (at 25°C)
Detected: 310 UMHO/CM
9/4/2025
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.