whatsinmywater.co
EPA SDWIS ยท Siskiyou County, California

Is WEED, CA Tap Water Safe?

WEED is served by 2 water providers on file with the EPA.

Data current as of July 2026
๐Ÿ”Straight from EPA
๐ŸงชReal Lab Results
๐Ÿ“…Updated Quarterly
๐Ÿ Local Expertise
Results for WEED, CA

2 water providers on file serving this city.

Quick answer: WEED'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 2,662 people, and the full breakdown below reflects everything EPA and California have on record for it.

Contaminants found

Metals
Naturally occurring or corrosion-related elements, e.g. lead, arsenic, copper
Lead Summary
Detected: 0 mg/L (ppm)
12/31/2027
Copper Summary
Detected: 1.62 mg/L (ppm)
12/31/1994
Copper, Free
Detected: 111 UG/L (ppb)
8/27/2025
Chromium, Hex
Detected: 0.2 UG/L (ppb)
3/20/2025
Manganese
Detected: 1.79 UG/L (ppb)
4/22/2025
Mainly a taste/staining concern at typical levels; long-term neurological research at high chronic exposure is ongoing.
Barium
Detected: 2.9 UG/L (ppb)
4/22/2025
Arsenic
Detected: 3.18 UG/L (ppb)
4/22/2025
Occurs naturally in some groundwater. Long-term exposure above the legal limit (10 ppb) has been linked to increased cancer risk and cardiovascular disease.
Zinc
Detected: 5.9 UG/L (ppb)
4/22/2025
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Nitrate
Detected: 2.41 MG/L (ppm)
Found at 2 providers
Commonly from agricultural fertilizer runoff or septic systems. Above the legal limit, it's an immediate concern especially for infants.
Chloride
Detected: 8.95 MG/L (ppm)
4/22/2025
Sulfate
Detected: 1.34 MG/L (ppm)
4/22/2025
Fluoride
Detected: 0.3 MG/L (ppm)
4/22/2025
Often added deliberately for dental health; can also occur naturally.
Minerals
Everyday minerals that mainly affect taste and water hardness
Magnesium
Detected: 6.2 MG/L (ppm)
4/22/2025
Sodium
Detected: 19 MG/L (ppm)
4/22/2025
Calcium
Detected: 7.2 MG/L (ppm)
4/22/2025
Properties
General water characteristics like pH, hardness, and cloudiness (turbidity)
Hardness, Total (ASCACO3)
Detected: 42 MG/L (ppm)
4/22/2025
pH
Detected: 7.54 PH
4/22/2025
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: 74 MG/L (ppm)
4/22/2025
Other
Additional substances tested that don't fit neatly into the categories above
Aggressive Index
Detected: 10.7 AGGR
4/22/2025
Alkalinity, Total
Detected: 74 MG/L (ppm)
4/22/2025
TDS
Detected: 137 MG/L (ppm)
4/22/2025
Turbidity
Detected: 1.3 NTU
4/22/2025
A measure of water cloudiness from suspended particles.
Conductivity (at 25ยฐC)
Detected: 169 UMHO/CM
4/22/2025
Filtration considerations: General system types, not a specific product recommendation.
Contaminant Whole-House Carbon Under-Sink RO Under-Sink Carbon
Total Trihalomethanes (TTHM)YesYesYes
Haloacetic Acids (HAA5)YesYesYes
ChloroformYesYesYes
Chlorine / TasteYesYesYes
Sediment / TurbidityYesYesYes
TrichloroethyleneYesYesYes
TetrachloroethyleneYesYesYes
cis-1,2-DichloroethyleneYesYesYes
1,1-DichloroethyleneYesYesYes
BromoformYesYesYes
BromodichloromethaneYesYesYes
DibromochloromethaneYesYesYes
1,1,2-TrichloroethaneYesYesYes
Vinyl ChlorideYesYesYes
Carbon TetrachlorideYesYesYes
BenzeneYesYesYes
TolueneYesYesYes
XyleneYesYesYes
LeadPartialYesPartial
ArsenicPartialYesPartial
Chromium-6 (Hexavalent)PartialYesPartial
CopperPartialYesPartial
Combined UraniumPartialYesPartial
PFOAPartialYes*Partial
PFOSPartialYes*Partial
NitratePartialYesPartial
Combined RadiumPartialYesPartial
Copper, FreePartialYesPartial
Chromium, HexPartialYesPartial
Aggressive IndexPartialYesPartial
Alkalinity, TotalPartialYesPartial
TDSPartialYesPartial
ChloridePartialYesPartial
SulfatePartialYesPartial
FluoridePartialYesPartial
ManganesePartialYesPartial
BariumPartialYesPartial
ZincPartialYesPartial
Conductivity (at 25ยฐC)PartialYesPartial
Coliform Bacteria (indicator)NoYesNo
MagnesiumNoPartialNo
SodiumNoPartialNo
CalciumNoPartialNo
Alkalinity, BicarbonateNoNoNo
Hardness, Total (ASCACO3)NoNoNo
pHNoNoNo

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What is TTHM? Understanding EPA Violation Status Is Chromium-6 Dangerous? Whole-House vs. Under-Sink Filtration Lead and Copper in Drinking Water What is PFAS? Arsenic and Uranium Explained Nitrate and Fluoride Explained Water Hardness, pH, and Turbidity What is Coliform Bacteria?