Serving roughly 65,231 people in Santa Cruz County, California.
Data current as of July 2026
🔍Straight from EPA
🧪Real Lab Results
📅Updated Quarterly
🏠Local Expertise
Results for WATSONVILLE, CITY OF
1 water provider directly on file, serving roughly 65,231 people in Santa Cruz County, California.
Quick answer: WATSONVILLE, CITY OF has no violations on file. One reading is worth knowing about: Chloride was measured at 585MG/L, among the highest of the 193 providers on file in this area. It's the most notable figure in this system's record among its 193 local peers.
Lead Summary
Copper Summary
Lithium
PFBS
PFHXS
PFOS
PFPEA
PFHXA
PFOA
Nitrate
Totalhaloaceticacids (HAA5)
TTHM
Chloroform
Bromoform
Bromodichloromethane
Dibromochloromethane
Dibromoaceticacid
Chloride
Perfluorobutanesulfonicacid (PFBS)
Perfluoroheptanoicacid (PFHPA)
Perfluorohexanesulfonicacid (PFHxS)
Perfluoroctanesulfonicacid (PFOS)
Perfluoroctanoicacid (PFOA)
Perfluorohexanoicacid (PFHXA)
Perfluorobutanoicacid (PFBA)
Perfluoropentanoicacid (PFPEA)
Manganese
Chromium, Hex
Temperature (CENTIGRADE)
Langelier Index (pH(s))
Langelier Index (Source Temp.)
Magnesium
Sodium
Calcium
Alkalinity, Total
Alkalinity, Bicarbonate
Alkalinity, Carbonate
Hardness, Total (ASCACO3)
TDS
Sulfate
Fluoride
Turbidity
Utility WATSONVILLE, CITY OFPopulation served 65,231Owner Local government
Naturally occurring or corrosion-related elements, e.g. lead, arsenic, copper
Lead Summary
Detected: 0.0012 mg/L (ppm)
12/31/2025
Copper Summary
Detected: 1.8 mg/L (ppm)
12/31/1993
Manganese
Detected: 52 UG/L (ppb)
10/8/2025
Mainly a taste/staining concern at typical levels; long-term neurological research at high chronic exposure is ongoing.
Chromium, Hex
Detected: 11 UG/L (ppb)
10/15/2025
Disinfection Byproducts
Formed when chlorine used to disinfect water reacts with organic matter
Totalhaloaceticacids (HAA5)
Detected: 2.6 UG/L (ppb)
9/2/2025
TTHM
Detected: 4.3 UG/L (ppb)
9/2/2025
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: 0.61 UG/L (ppb)
9/2/2025
One of the individual trihalomethane disinfection byproducts, formed when chlorine reacts with organic matter.
Bromoform
Detected: 1.1 UG/L (ppb)
9/2/2025
Bromodichloromethane
Detected: 1.1 UG/L (ppb)
9/2/2025
Dibromochloromethane
Detected: 1.5 UG/L (ppb)
9/2/2025
Inorganics
Common dissolved minerals and salts, e.g. nitrate, fluoride, chloride
Nitrate
Detected: 2.6 MG/L (ppm)
10/22/2025
Commonly from agricultural fertilizer runoff or septic systems. Above the legal limit, it's an immediate concern especially for infants.
Chloride
Detected: 585 MG/L (ppm)
10/15/2025
Sulfate
Detected: 54 MG/L (ppm)
4/23/2025
Fluoride
Detected: 0.22 MG/L (ppm)
4/23/2025
Often added deliberately for dental health; can also occur naturally.
Minerals
Everyday minerals that mainly affect taste and water hardness
Magnesium
Detected: 17 MG/L (ppm)
4/23/2025
Sodium
Detected: 29 MG/L (ppm)
4/23/2025
Calcium
Detected: 54 MG/L (ppm)
4/23/2025
Properties
General water characteristics like pH, hardness, and cloudiness (turbidity)
Langelier Index (pH(s))
Detected: 1.6 LANG
4/23/2025
Hardness, Total (ASCACO3)
Detected: 200 MG/L (ppm)
4/23/2025
PFAS & Emerging Contaminants
Human-made "forever chemicals" and other substances not yet fully regulated
Lithium
Detected: 19.2 µg/L (ppb)
1/22/2025
Occurs naturally in some groundwater. Not currently federally regulated in drinking water.
PFBS
Detected: 0.0057 µg/L (ppb)
10/9/2024
PFHXS
Detected: 0.0058 µg/L (ppb)
10/9/2024
PFOS
Detected: 0.0051 µg/L (ppb)
10/9/2024
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
PFPEA
Detected: 0.0033 µg/L (ppb)
10/9/2024
PFHXA
Detected: 0.0032 µg/L (ppb)
10/9/2024
PFOA
Detected: 0.0065 µg/L (ppb)
10/9/2024
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: 180 MG/L (ppm)
4/23/2025
Alkalinity, Carbonate
Detected: 6.5 MG/L (ppm)
4/23/2025
Other
Additional substances tested that don't fit neatly into the categories above
Dibromoaceticacid
Detected: 1 UG/L (ppb)
9/2/2025
Perfluorobutanesulfonicacid (PFBS)
Detected: 10 NG/L (ppt)
9/3/2025
Perfluoroheptanoicacid (PFHPA)
Detected: 6.2 NG/L (ppt)
9/3/2025
Perfluorohexanesulfonicacid (PFHxS)
Detected: 13 NG/L (ppt)
9/3/2025
Perfluoroctanesulfonicacid (PFOS)
Detected: 5.2 NG/L (ppt)
9/3/2025
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
Perfluoroctanoicacid (PFOA)
Detected: 13 NG/L (ppt)
9/3/2025
One of two PFAS with an enforceable federal limit (4 ppt) since 2024.
Perfluorohexanoicacid (PFHXA)
Detected: 10 NG/L (ppt)
9/3/2025
Perfluorobutanoicacid (PFBA)
Detected: 4.2 NG/L (ppt)
9/3/2025
Perfluoropentanoicacid (PFPEA)
Detected: 10 NG/L (ppt)
9/3/2025
Temperature (CENTIGRADE)
Detected: 14.7 C
10/7/2025
Langelier Index (Source Temp.)
Detected: 0.94 LANG
4/23/2025
Alkalinity, Total
Detected: 190 MG/L (ppm)
4/23/2025
TDS
Detected: 310 MG/L (ppm)
4/23/2025
Turbidity
Detected: 0.85 NTU
5/5/2025
A measure of water cloudiness from suspended particles.
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.