Serving roughly 4,340 people in Santa Cruz County, California.
Data current as of July 2026
🔍Straight from EPA
🧪Real Lab Results
📅Updated Quarterly
🏠Local Expertise
Results for SLVWD - FELTON WATER SYSTEM
1 water provider directly on file, serving roughly 4,340 people in Santa Cruz County, California.
Quick answer: SLVWD - FELTON WATER SYSTEM currently has an open health-based violation on file: Lead And Copper Rule Revisions, a compliance issue since 10/17/2024. This is active, not historical — see the violation detail below for what EPA's enforcement record shows.
Lead Summary
Totalhaloaceticacids (HAA5)
TTHM
Chloroform
Bromoform
Bromodichloromethane
Dibromochloromethane
Dichloroaceticacid
Trichloroaceticacid
Dibromoaceticacid
Aggressive Index
Langelier Index (pH(s))
Langelier Index (Source Temp.)
Magnesium
Potassium
Sodium
Calcium
Alkalinity, Total
Alkalinity, Bicarbonate
Hardness, Total (ASCACO3)
TDS
Sulfate
Chloride
Fluoride
Nitrate
pH
Barium
Arsenic
Copper, Free
Conductivity (at 25°C)
Nickel
Iron
Manganese
Aluminum
Utility SLVWD - FELTON WATER SYSTEMPopulation served 4,340Owner Private
Open violation on file
Violations on file
Lead And Copper Rule Revisions
Currently open health violation
Found at 1 of 1 provider
Contaminants found
Metals
Naturally occurring or corrosion-related elements, e.g. lead, arsenic, copper
Lead Summary
Detected: 0 mg/L (ppm)
12/31/2023
Barium
Detected: 43 UG/L (ppb)
5/28/2025
Arsenic
Detected: 1.3 UG/L (ppb)
5/28/2025
Occurs naturally in some groundwater. Long-term exposure above the legal limit (10 ppb) has been linked to increased cancer risk and cardiovascular disease.
Copper, Free
Detected: 3.7 UG/L (ppb)
5/28/2025
Nickel
Detected: 1.2 UG/L (ppb)
5/28/2025
Iron
Detected: 66 UG/L (ppb)
5/28/2025
Mostly an aesthetic issue (metallic taste, staining) rather than a health concern at typical levels.
Manganese
Detected: 2.2 UG/L (ppb)
5/28/2025
Mainly a taste/staining concern at typical levels; long-term neurological research at high chronic exposure is ongoing.
Aluminum
Detected: 21 UG/L (ppb)
5/28/2025
Disinfection Byproducts
Formed when chlorine used to disinfect water reacts with organic matter
Totalhaloaceticacids (HAA5)
Detected: 12 UG/L (ppb)
8/26/2025
TTHM
Detected: 22 UG/L (ppb)
8/26/2025
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: 9.2 UG/L (ppb)
8/26/2025
One of the individual trihalomethane disinfection byproducts, formed when chlorine reacts with organic matter.
Bromoform
Detected: 0.67 UG/L (ppb)
8/26/2025
Bromodichloromethane
Detected: 7.4 UG/L (ppb)
8/26/2025
Dibromochloromethane
Detected: 4.9 UG/L (ppb)
8/26/2025
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Sulfate
Detected: 8.8 MG/L (ppm)
5/28/2025
Chloride
Detected: 8.6 MG/L (ppm)
5/28/2025
Fluoride
Detected: 0.12 MG/L (ppm)
5/28/2025
Often added deliberately for dental health; can also occur naturally.
Nitrate
Detected: 0.17 MG/L (ppm)
5/28/2025
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: 18 MG/L (ppm)
5/28/2025
Potassium
Detected: 1.7 MG/L (ppm)
5/28/2025
Sodium
Detected: 8.4 MG/L (ppm)
5/28/2025
Calcium
Detected: 77 MG/L (ppm)
5/28/2025
Properties
General water characteristics like pH, hardness, and cloudiness (turbidity)
Langelier Index (pH(s))
Detected: 1.4 LANG
5/28/2025
Hardness, Total (ASCACO3)
Detected: 260 MG/L (ppm)
5/28/2025
pH
Detected: 8 PH
5/28/2025
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: 250 MG/L (ppm)
5/28/2025
Other
Additional substances tested that don't fit neatly into the categories above
Dichloroaceticacid
Detected: 5.4 UG/L (ppb)
8/26/2025
Trichloroaceticacid
Detected: 5.1 UG/L (ppb)
8/26/2025
Dibromoaceticacid
Detected: 1.1 UG/L (ppb)
8/26/2025
Aggressive Index
Detected: 13 AGGR
5/28/2025
Langelier Index (Source Temp.)
Detected: 0.84 LANG
5/28/2025
Alkalinity, Total
Detected: 250 MG/L (ppm)
5/28/2025
TDS
Detected: 300 MG/L (ppm)
5/28/2025
Conductivity (at 25°C)
Detected: 520 UMHO/CM
5/28/2025
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.