Serving roughly 8,011 people in San Luis Obispo County, California.
Data current as of July 2026
🔍Straight from EPA
🧪Real Lab Results
📅Updated Quarterly
🏠Local Expertise
Results for TEMPLETON CSD
1 water provider directly on file, serving roughly 8,011 people in San Luis Obispo County, California.
Quick answer: TEMPLETON CSD has no violations on file. One reading is worth knowing about: Bromoform was measured at 17UG/L, among the highest of the 252 providers on file in this area. It's the most notable figure in this system's record among its 252 local peers.
Lead Summary
Lithium
PFBS
PFHXS
Aggressive Index
Langelier Index (pH(s))
Magnesium
Potassium
Sodium
Hardness, Total (ASCACO3)
Calcium
Alkalinity, Total
Alkalinity, Bicarbonate
TDS
Sulfate
Chloride
Fluoride
Nitrate
Nitrate-Nitrite
Turbidity
pH, Field
Iron
Manganese
Chromium, Hex
Chromium
Arsenic
Selenium
Zinc
Conductivity (at 25°C)
Totalhaloaceticacids (HAA5)
TTHM
Chloroform
Bromoform
Bromodichloromethane
Dibromochloromethane
Dibromoaceticacid
Combined Uranium
Gross Alpha Particle Activity
Boron, Total
Vanadium, Total
Utility TEMPLETON CSDPopulation served 8,011Owner 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)
12/31/2023
Iron
Detected: 70 UG/L (ppb)
6/12/2025
Mostly an aesthetic issue (metallic taste, staining) rather than a health concern at typical levels.
Manganese
Detected: 6.9 UG/L (ppb)
6/12/2025
Mainly a taste/staining concern at typical levels; long-term neurological research at high chronic exposure is ongoing.
Chromium, Hex
Detected: 0.5 UG/L (ppb)
2/11/2025
Chromium
Detected: 13 UG/L (ppb)
8/7/2025
Occurs in two forms — trivalent (an essential nutrient in trace amounts) and hexavalent (linked to increased cancer risk).
Arsenic
Detected: 6.4 UG/L (ppb)
10/28/2025
Occurs naturally in some groundwater. Long-term exposure above the legal limit (10 ppb) has been linked to increased cancer risk and cardiovascular disease.
Selenium
Detected: 11 UG/L (ppb)
8/7/2025
Zinc
Detected: 30 UG/L (ppb)
6/12/2025
Combined Uranium
Detected: 3.33 PCI/L
8/7/2025
A naturally occurring radioactive metal. Long-term exposure above the legal limit is associated with kidney effects and increased cancer risk.
Vanadium, Total
Detected: 16 UG/L (ppb)
8/7/2025
Disinfection Byproducts
Formed when chlorine used to disinfect water reacts with organic matter
Totalhaloaceticacids (HAA5)
Detected: 7 UG/L (ppb)
8/19/2025
TTHM
Detected: 44 UG/L (ppb)
8/19/2025
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: 2 UG/L (ppb)
8/19/2025
One of the individual trihalomethane disinfection byproducts, formed when chlorine reacts with organic matter.
Bromoform
Detected: 17 UG/L (ppb)
8/19/2025
Bromodichloromethane
Detected: 7 UG/L (ppb)
8/19/2025
Dibromochloromethane
Detected: 18 UG/L (ppb)
8/19/2025
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Sulfate
Detected: 179 MG/L (ppm)
8/7/2025
Chloride
Detected: 100 MG/L (ppm)
8/7/2025
Fluoride
Detected: 0.2 MG/L (ppm)
8/7/2025
Often added deliberately for dental health; can also occur naturally.
Nitrate
Detected: 5 MG/L (ppm)
9/30/2025
Commonly from agricultural fertilizer runoff or septic systems. Above the legal limit, it's an immediate concern especially for infants.
Nitrate-Nitrite
Detected: 2.2 MG/L (ppm)
8/7/2025
Boron, Total
Detected: 100 UG/L (ppb)
8/7/2025
Minerals
Everyday minerals that mainly affect taste and water hardness
Magnesium
Detected: 53 MG/L (ppm)
8/7/2025
Potassium
Detected: 3 MG/L (ppm)
8/7/2025
Sodium
Detected: 50 MG/L (ppm)
8/7/2025
Calcium
Detected: 120 MG/L (ppm)
8/7/2025
Properties
General water characteristics like pH, hardness, and cloudiness (turbidity)
Langelier Index (pH(s))
Detected: 0.08 LANG
8/7/2025
Hardness, Total (ASCACO3)
Detected: 517 MG/L (ppm)
8/7/2025
pH, Field
Detected: 7 PH
8/7/2025
Gross Alpha Particle Activity
Detected: 5.74 PCI/L
8/7/2025
PFAS & Emerging Contaminants
Human-made "forever chemicals" and other substances not yet fully regulated
Lithium
Detected: 23.6 µg/L (ppb)
9/16/2025
Occurs naturally in some groundwater. Not currently federally regulated in drinking water.
PFBS
Detected: 0.0033 µg/L (ppb)
9/16/2025
PFHXS
Detected: 0.0032 µg/L (ppb)
6/9/2025
Calculated Parameters
Values worked out mathematically from other test results, not measured directly
Alkalinity, Bicarbonate
Detected: 400 MG/L (ppm)
8/7/2025
Other
Additional substances tested that don't fit neatly into the categories above
Aggressive Index
Detected: 12 AGGR
8/7/2025
Alkalinity, Total
Detected: 320 MG/L (ppm)
8/7/2025
TDS
Detected: 880 MG/L (ppm)
8/7/2025
Turbidity
Detected: 0.1 NTU
10/21/2025
A measure of water cloudiness from suspended particles.
Conductivity (at 25°C)
Detected: 1220 UMHO/CM
8/7/2025
Dibromoaceticacid
Detected: 7 UG/L (ppb)
8/19/2025
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.