Serving roughly 15,452 people in Placer County, California.
Data current as of July 2026
🔍Straight from EPA
🧪Real Lab Results
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Results for NORTHSTAR C.S.D.
1 water provider directly on file, serving roughly 15,452 people in Placer County, California.
Quick answer: NORTHSTAR C.S.D. has no violations on file. One reading is worth knowing about: Alkalinity, Total was measured at 108MG/L, among the highest of the 246 providers on file in this area. It's the most notable figure in this system's record among its 246 local peers.
Lead Summary
TTHM
Chloroform
Bromodichloromethane
Chromium, Hex
Aggressive Index
Magnesium
Hardness, Total (ASCACO3)
Calcium
Alkalinity, Total
Alkalinity, Bicarbonate
pH
Utility NORTHSTAR C.S.D.Population served 15,452Owner Local government
No violations on file
Contaminants found
Metals
Naturally occurring or corrosion-related elements, e.g. lead, arsenic, copper
Lead Summary
Detected: 0.00435 mg/L (ppm)
12/31/2024
Chromium, Hex
Detected: 0.12 UG/L (ppb)
4/15/2025
Disinfection Byproducts
Formed when chlorine used to disinfect water reacts with organic matter
TTHM
Detected: 3 UG/L (ppb)
8/14/2025
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: 1.7 UG/L (ppb)
8/14/2025
One of the individual trihalomethane disinfection byproducts, formed when chlorine reacts with organic matter.
Bromodichloromethane
Detected: 1.3 UG/L (ppb)
8/14/2025
Minerals
Everyday minerals that mainly affect taste and water hardness
Magnesium
Detected: 3.77 MG/L (ppm)
1/23/2025
Calcium
Detected: 17.6 MG/L (ppm)
1/23/2025
Properties
General water characteristics like pH, hardness, and cloudiness (turbidity)
Hardness, Total (ASCACO3)
Detected: 59.4 MG/L (ppm)
1/23/2025
pH
Detected: 8.05 PH
1/23/2025
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: 108 MG/L (ppm)
1/23/2025
Other
Additional substances tested that don't fit neatly into the categories above
Aggressive Index
Detected: 11.6 AGGR
1/23/2025
Alkalinity, Total
Detected: 108 MG/L (ppm)
1/23/2025
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.