Serving roughly 36,730 people in Nevada County, California.
Data current as of July 2026
🔍Straight from EPA
🧪Real Lab Results
📅Updated Quarterly
🏠Local Expertise
Results for TRUCKEE-DONNER PUD, MAIN
1 water provider directly on file, serving roughly 36,730 people in Nevada County, California.
Quick answer: TRUCKEE-DONNER PUD, MAIN has no violations on file. One reading is worth knowing about: Alkalinity, Total was measured at 91MG/L, among the highest of the 220 providers on file in this area. It's the most notable figure in this system's record among its 220 local peers.
Lead Summary
Lithium
PFHXA
PFPEA
PFOA
Lead
Totalhaloaceticacids (HAA5)
TTHM
Chloroform
Bromodichloromethane
Dibromochloromethane
Dichloroaceticacid
Trichloroaceticacid
Bromoform
Dibromoaceticacid
Arsenic
Copper, Free
Aggressive Index
Langelier Index (pH(s))
Langelier Index (Source Temp.)
Magnesium
Potassium
Sodium
Calcium
Alkalinity, Total
Alkalinity, Bicarbonate
Hardness, Total (ASCACO3)
TDS
Chloride
Sulfate
Fluoride
Nitrate
Turbidity
Combined Uranium
pH
Odor
Iron
Manganese
Chromium
Barium
Aluminum
Conductivity (at 25°C)
Color
Utility TRUCKEE-DONNER PUD, MAINPopulation served 36,730Owner Local government
No violations on file
Contaminants found
Metals
Naturally occurring or corrosion-related elements, e.g. lead, arsenic, copper
Lead Summary
Detected: 0.0039 mg/L (ppm)
12/31/2025
Lead
Detected: 0.57 UG/L (ppb)
8/27/2025
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.
Arsenic
Detected: 7.9 UG/L (ppb)
9/3/2025
Occurs naturally in some groundwater. Long-term exposure above the legal limit (10 ppb) has been linked to increased cancer risk and cardiovascular disease.
Copper, Free
Detected: 45 UG/L (ppb)
8/27/2025
Combined Uranium
Detected: 0.78 PCI/L
7/9/2025
A naturally occurring radioactive metal. Long-term exposure above the legal limit is associated with kidney effects and increased cancer risk.
Iron
Detected: 15 UG/L (ppb)
6/18/2025
Mostly an aesthetic issue (metallic taste, staining) rather than a health concern at typical levels.
Manganese
Detected: 5.1 UG/L (ppb)
5/21/2025
Mainly a taste/staining concern at typical levels; long-term neurological research at high chronic exposure is ongoing.
Chromium
Detected: 2 UG/L (ppb)
7/9/2025
Occurs in two forms — trivalent (an essential nutrient in trace amounts) and hexavalent (linked to increased cancer risk).
Barium
Detected: 6.4 UG/L (ppb)
7/9/2025
Aluminum
Detected: 42 UG/L (ppb)
5/21/2025
Disinfection Byproducts
Formed when chlorine used to disinfect water reacts with organic matter
Totalhaloaceticacids (HAA5)
Detected: 2.3 UG/L (ppb)
8/5/2025
TTHM
Detected: 5.8 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.
Chloroform
Detected: 3.3 UG/L (ppb)
8/5/2025
One of the individual trihalomethane disinfection byproducts, formed when chlorine reacts with organic matter.
Bromodichloromethane
Detected: 1.7 UG/L (ppb)
8/5/2025
Dibromochloromethane
Detected: 0.76 UG/L (ppb)
8/5/2025
Bromoform
Detected: 1.4 UG/L (ppb)
8/5/2025
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Chloride
Detected: 3.5 MG/L (ppm)
7/9/2025
Sulfate
Detected: 1.7 MG/L (ppm)
7/9/2025
Fluoride
Detected: 0.052 MG/L (ppm)
6/18/2025
Often added deliberately for dental health; can also occur naturally.
Nitrate
Detected: 0.15 MG/L (ppm)
6/17/2025
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
Magnesium
Detected: 9.4 MG/L (ppm)
7/9/2025
Potassium
Detected: 2.3 MG/L (ppm)
7/9/2025
Sodium
Detected: 9 MG/L (ppm)
7/9/2025
Calcium
Detected: 16 MG/L (ppm)
7/9/2025
Properties
General water characteristics like pH, hardness, and cloudiness (turbidity)
Langelier Index (pH(s))
Detected: 0.6 LANG
7/9/2025
Hardness, Total (ASCACO3)
Detected: 79 MG/L (ppm)
7/9/2025
pH
Detected: 8.3 PH
7/9/2025
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: 9.16 µg/L (ppb)
11/6/2023
Occurs naturally in some groundwater. Not currently federally regulated in drinking water.
PFHXA
Detected: 0.0044 µg/L (ppb)
9/13/2023
PFPEA
Detected: 0.0046 µg/L (ppb)
9/13/2023
PFOA
Detected: 0.0046 µg/L (ppb)
9/13/2023
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
Calculated Parameters
Values worked out mathematically from other test results, not measured directly
Alkalinity, Bicarbonate
Detected: 90 MG/L (ppm)
7/9/2025
Other
Additional substances tested that don't fit neatly into the categories above
Dichloroaceticacid
Detected: 1.2 UG/L (ppb)
8/5/2025
Trichloroaceticacid
Detected: 1.1 UG/L (ppb)
8/5/2025
Dibromoaceticacid
Detected: 1.4 UG/L (ppb)
8/5/2025
Aggressive Index
Detected: 12 AGGR
7/9/2025
Langelier Index (Source Temp.)
Detected: 0.013 LANG
7/9/2025
Alkalinity, Total
Detected: 91 MG/L (ppm)
7/9/2025
TDS
Detected: 120 MG/L (ppm)
7/9/2025
Turbidity
Detected: 0.15 NTU
7/9/2025
A measure of water cloudiness from suspended particles.
Odor
Detected: 1 TON
6/12/2025
Conductivity (at 25°C)
Detected: 190 UMHO/CM
7/9/2025
Color
Detected: 2 UNITS
6/12/2025
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.