REDDING is served by 2 water providers on file with the EPA.
Data current as of July 2026
🔍Straight from EPA
🧪Real Lab Results
📅Updated Quarterly
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Results for REDDING, CA
2 water providers on file serving this city.
Quick answer: REDDING's water has no violations on file and no single reading stands out against its peers (2 other providers in this area). It serves roughly 89,628 people, and the full breakdown below reflects everything EPA and California have on record for it.
Lead Summary
PFOS
PFHXA
PFOA
PFPEA
PFHXS
PFHPA
PFBS
Lithium
Magnesium
Calcium
Alkalinity, Total
Alkalinity, Bicarbonate
Hardness, Total (ASCACO3)
TDS
pH
Lead
Totalhaloaceticacids (HAA5)
TTHM
Chloroform
Bromoform
Bromodichloromethane
Dibromochloromethane
Dichloroaceticacid
Trichloroaceticacid
Copper, Free
Conductivity (at 25°C)
Sodium
Nitrate
Contaminants found
Metals
Naturally occurring or corrosion-related elements, e.g. lead, arsenic, copper
Lead Summary
Detected: 0.00213 mg/L (ppm)
12/31/2025
Lead
Detected: 3.8 UG/L (ppb)
7/30/2025
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.
Copper, Free
Detected: 5.86 UG/L (ppb)
10/8/2025
Disinfection Byproducts
Formed when chlorine used to disinfect water reacts with organic matter
Totalhaloaceticacids (HAA5)
Detected: 32 UG/L (ppb)
10/15/2025
TTHM
Detected: 27 UG/L (ppb)
10/15/2025
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: 25 UG/L (ppb)
10/15/2025
One of the individual trihalomethane disinfection byproducts, formed when chlorine reacts with organic matter.
Bromoform
Detected: 0.57 UG/L (ppb)
1/9/2025
Bromodichloromethane
Detected: 1.9 UG/L (ppb)
10/15/2025
Dibromochloromethane
Detected: 1.2 UG/L (ppb)
1/9/2025
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Nitrate
Detected: 2.63 MG/L (ppm)
2/5/2025
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: 9.9 MG/L (ppm)
Found at 2 providers
Calcium
Detected: 14.5 MG/L (ppm)
Found at 2 providers
Sodium
Detected: 11.9 MG/L (ppm)
3/7/2025
Properties
General water characteristics like pH, hardness, and cloudiness (turbidity)
Hardness, Total (ASCACO3)
Detected: 73 MG/L (ppm)
Found at 2 providers
pH
Detected: 7.32 PH
Found at 2 providers
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
PFOS
Detected: 0.0095 µg/L (ppb)
9/27/2023
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
PFHXA
Detected: 0.0057 µg/L (ppb)
9/27/2023
PFOA
Detected: 0.012 µg/L (ppb)
9/27/2023
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
PFPEA
Detected: 0.0054 µg/L (ppb)
9/27/2023
PFHXS
Detected: 0.0056 µg/L (ppb)
9/27/2023
PFHPA
Detected: 0.0041 µg/L (ppb)
9/27/2023
PFBS
Detected: 0.0089 µg/L (ppb)
9/27/2023
Lithium
Detected: 27.8 µg/L (ppb)
9/12/2023
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: 73 MG/L (ppm)
Found at 2 providers
Other
Additional substances tested that don't fit neatly into the categories above
Alkalinity, Total
Detected: 73 MG/L (ppm)
Found at 2 providers
TDS
Detected: 104 MG/L (ppm)
10/8/2025
Dichloroaceticacid
Detected: 12 UG/L (ppb)
10/15/2025
Trichloroaceticacid
Detected: 20 UG/L (ppb)
10/15/2025
Conductivity (at 25°C)
Detected: 94 UMHO/CM
10/8/2025
Filtration considerations: General system types, not a specific product recommendation.