Water Quality in San Jose, CA (93908)
EPA violation data for public water systems serving ZIP code 93908.
Active Health Violations
124 health-based violations found in the past 5 years, with at least one still unresolved. Contaminant levels have exceeded federal safety limits. Consider testing your tap water independently.
More violations than 97% of US ZIP codes.
Based on EPA compliance data. Not a substitute for an official water quality report from your utility.
12,450
Population
79
Water Systems
146
Violations (5yr)
124
Health-Based
Location
Loading map...
Water Systems Serving This Area (79)
Cwsc Salinas
Groundwater 123,679 people served
0 violations
Lead tested: 1 ppb (limit: 15 ppb) ✓
Cal Am Water Company - Monterey
Groundwater under influence of surface water 92,450 people served
0 violations
Lead tested: 2 ppb (limit: 15 ppb) ✓
Alco Water Service
Groundwater 56,253 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb) ✓
Marina Coast Water District
Groundwater 38,377 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb) ✓
Toro Regional Park
Groundwater 2,000 people served
0 violations
Corral De Tierra Country Club Ws
Groundwater 705 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb) ✓ Copper tested: 2070 ppb (limit: 1300 ppb)
Cypress Center Ws
Groundwater 440 people served
0 violations
Chamisal Wa
Groundwater 396 people served
1 violation (5yr)
Lead tested: 2.3 ppb (limit: 15 ppb) ✓ Copper tested: 1707 ppb (limit: 1300 ppb)
Vista Del Rio Water System
Groundwater 360 people served
0 violations
San Benancio School Ws
Groundwater 350 people served
0 violations
Harris Rd Ws #10
Groundwater 284 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb) ✓
Pedrazzi Mwc
Groundwater 273 people served
0 violations
Washington School Ws
12 health-based Groundwater 250 people served
12 violations (5yr)
· 12 health-based · All resolved
Lead tested: 2.1 ppb (limit: 15 ppb) ✓ Copper tested: 2050 ppb (limit: 1300 ppb)
Cypress Community Church Ws
Groundwater 207 people served
0 violations
Foothill Estates Ws
Groundwater 183 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb) ✓
Wildwood Wc
Groundwater 166 people served
0 violations
Matsui Nursery Ws
Groundwater 165 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb) ✓
Laguna Seca Wc
15 health-based Groundwater 162 people served
15 violations (5yr)
· 15 health-based · All resolved
Lead tested: 5.4 ppb (limit: 15 ppb) ✓ Copper tested: 1670 ppb (limit: 1300 ppb)
Corral De Tierra Country Club
Groundwater 150 people served
0 violations
El Camino Wc Inc
5 health-based Groundwater 133 people served
6 violations (5yr)
· 5 health-based
Princes Camp Resort Ws
Groundwater 126 people served
0 violations
Monterey Botanicals Ws
Groundwater 120 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb) ✓
Bluffs Ws
Groundwater 120 people served
0 violations
Flrish Farms Ws
Groundwater 97 people served
1 violation (5yr)
Lead tested: 5.9 ppb (limit: 15 ppb) ✓ Copper tested: 1991 ppb (limit: 1300 ppb)
Robley Property Mws
Groundwater 92 people served
1 violation (5yr)
Lead tested: 4.9 ppb (limit: 15 ppb) ✓ Copper tested: 2555 ppb (limit: 1300 ppb)
Vista Del Toro Ws
Groundwater 92 people served
1 violation (5yr)
Encinal Rd Ws #01
17 health-based Groundwater 91 people served
18 violations (5yr)
· 17 health-based
Lead tested: 2.4 ppb (limit: 15 ppb) ✓
Mesa Del Toro Mwc
Groundwater 90 people served
0 violations
Lead tested: 3.7 ppb (limit: 15 ppb) ✓
Iverson & Jacks Apts Ws
Groundwater 86 people served
0 violations
Floricultura Pacific Ws
Groundwater 82 people served
0 violations
Lead tested: 8.2 ppb (limit: 15 ppb) ✓
Harold Soule
Groundwater 80 people served
0 violations
Free Will Baptist Church Ws
Groundwater 80 people served
0 violations
Monterey Valley Pride-Spence Rd Ws
Groundwater 73 people served
0 violations
Alvarez Brothers Ws
Groundwater 70 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb) ✓
Hartnell Rd Ws #1
Groundwater 69 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb) ✓
Los Laureles Gr Water Sys #3
Groundwater 64 people served
0 violations
Z Ranch Mwc
Groundwater 62 people served
0 violations
Lead tested: 4.4 ppb (limit: 15 ppb) ✓
Armstrong Rd Ws #1
Groundwater 60 people served
0 violations
Graves School Ws
1 health-based Groundwater 56 people served
2 violations (5yr)
· 1 health-based
Lead tested: 31 ppb (limit: 15 ppb)
Tierra Vista Mwc
1 health-based Groundwater 54 people served
2 violations (5yr)
· 1 health-based
Top Industries Ws
15 health-based Groundwater 50 people served
15 violations (5yr)
· 15 health-based · All resolved
Church Of The Good Shepherd Ws
Groundwater 50 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb) ✓
Onitsuka Brothers Ws
Groundwater 50 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb) ✓
River Rd Ws #26
Groundwater 49 people served
0 violations
Tierra Verde Mwc
Groundwater 48 people served
0 violations
Lead tested: 1.9 ppb (limit: 15 ppb) ✓
Faith And Family Farms Ws
8 health-based Groundwater 47 people served
8 violations (5yr)
· 8 health-based · All resolved
Lead tested: 0 ppb (limit: 15 ppb) ✓
Foothill Wa
1 health-based Groundwater 46 people served
2 violations (5yr)
· 1 health-based
Lead tested: 0 ppb (limit: 15 ppb) ✓
Corral De Tierra Estates Wc
15 health-based Groundwater 45 people served
15 violations (5yr)
· 15 health-based · All resolved
Mount Toro Ranchos Mwa
Groundwater 45 people served
0 violations
Spreckels Ln Ws #03
Groundwater 45 people served
0 violations
Lhoist North America Ws
14 health-based Groundwater 44 people served
14 violations (5yr)
· 14 health-based · All resolved
Lead tested: 3 ppb (limit: 15 ppb) ✓
Emerald Valley-Zabala Ws
Groundwater 40 people served
0 violations
Lead tested: 0.8 ppb (limit: 15 ppb) ✓ Copper tested: 1480 ppb (limit: 1300 ppb)
Calera Canyon Heights Hoa
Groundwater 40 people served
0 violations
Lead tested: 4.2 ppb (limit: 15 ppb) ✓ Copper tested: 1590 ppb (limit: 1300 ppb)
Berry Dr Ws #02
Groundwater 40 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb) ✓
Iverson Rd Ws #03
Groundwater 37 people served
0 violations
Spreckels Ln Ws #02
1 health-based Groundwater 31 people served
4 violations (5yr)
· 1 health-based
Lead tested: 53.2 ppb (limit: 15 ppb)
Corral De Tierra Grange Hall
Groundwater 30 people served
0 violations
River Rd Ws #28
Groundwater 30 people served
0 violations
Corral De Tierra Country Club
Groundwater 30 people served
0 violations
Potter Road Water System #1
Groundwater 30 people served
0 violations
Green Valley Floral-Potter Rd Ws
Groundwater 30 people served
0 violations
Pentecostal Ws
4 health-based Groundwater 29 people served
4 violations (5yr)
· 4 health-based · All resolved
Lead tested: 1.2 ppb (limit: 15 ppb) ✓
Harrington Rd Ws #07
Groundwater 26 people served
2 violations (5yr)
Lead tested: 0 ppb (limit: 15 ppb) ✓
Cea Development, Llc Ws
All resolved Groundwater 25 people served
3 violations (5yr)
· All resolved
Lead tested: 1.5 ppb (limit: 15 ppb) ✓
Seii Productions Inc. Water System
Groundwater 25 people served
0 violations
Pacific Reserve Nursery Ws
1 health-based Groundwater 25 people served
5 violations (5yr)
· 1 health-based
Lead tested: 0 ppb (limit: 15 ppb) ✓
Church Of The Good Shepherd
Groundwater 25 people served
0 violations
Zabala Farms Ws
Groundwater 25 people served
0 violations
Kind Real Estate, Llc Ws
Groundwater 25 people served
0 violations
Grange Hall Ws
14 health-based Groundwater 25 people served
14 violations (5yr)
· 14 health-based · All resolved
Corral De Tierra Grange Hill
Groundwater 25 people served
0 violations
Green Valley Floral-Osr Ws
Groundwater 25 people served
0 violations
Spence Rd Cultivation Ws
Groundwater 25 people served
0 violations
Lead tested: 2.3 ppb (limit: 15 ppb) ✓
San Miguel Water System #17
Groundwater 25 people served
0 violations
Exxon Station Ws
All resolved Groundwater 25 people served
1 violation (5yr)
· All resolved
Alisal Rd Ws #3 - 2262 Alisal Rd
Groundwater 25 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb) ✓
Horn Ws
Groundwater 25 people served
0 violations
Corral De Tierra Water Sys 11
Groundwater 12 people served
0 violations
Kohara Nursery Ws
Groundwater 12 people served
0 violations
Contaminants Found
NitrateHealth-Based
At high levels, nitrate can cause blue baby syndrome in infants.
62 violations
All resolved
ArsenicHealth-Based
A naturally occurring element that can cause cancer and other health effects at high levels.
50 violations
All resolved
LEAD AND COPPER RULE REVISIONSHealth-Based
14 violations
Has active
CadmiumHealth-Based
6 violations
All resolved
Revised Total Coliform RuleHealth-Based
Missed testing deadlines — not a detection of bacteria.
1 violation
All resolved
Lead and Copper RuleMonitoring
Lead and copper testing requirement. Lead exposure can cause developmental harm in children.
13 violations
Has active
Lead & Copper Levels
Lead (Pb)
Within limit5.9 ppb measured
Action level: 15 ppb
Sampled: Jul 2025
Copper (Cu)
Exceeds limit1991 ppb measured
Action level: 1300 ppb
Sampled: Jul 2025
How Does This Compare?
San Jose (93908) has more violations than 97% of US ZIP codes. The national average is 18.87 violations per ZIP over 5 years. This ZIP has 146.
Fewer violations 97th percentile More violations
Recommended Water Filters
Based on health-based violations detected in your area, these filter types are commonly used to address similar contaminants. Consult your water utility's Consumer Confidence Report for the most current data.
Reverse Osmosis System
Highly effective at removing heavy metals, dissolved solids, and a wide range of contaminants. Recommended for homes with lead or arsenic concerns.
Targets:Lead, Copper, Arsenic, Mercury, Cadmium
Look for:NSF/ANSI 58 certified
UV Water Purifier
Uses ultraviolet light to neutralize bacteria, viruses, and parasites without chemicals. Ideal for homes with microbial contamination concerns.
Targets:E. coli, Coliform, Giardia, Cryptosporidium
Look for:NSF/ANSI 55 (Class A) certified
Always look for filters certified by NSF International for the specific contaminants you want to remove. This is general educational information, not an endorsement of any specific product.