Water Quality in San Jose, CA (93907)
EPA violation data for public water systems serving ZIP code 93907.
Active Health Violations
91 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 96% of US ZIP codes.
Based on EPA compliance data. Not a substitute for an official water quality report from your utility.
25,146
Population
95
Water Systems
127
Violations (5yr)
91
Health-Based
Location
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Water Systems Serving This Area (95)
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) ✓
Laguna Seca Recreation Ws
16 health-based Groundwater 1,248 people served
18 violations (5yr)
· 16 health-based
Lead tested: 0 ppb (limit: 15 ppb) ✓ Copper tested: 1740 ppb (limit: 1300 ppb)
Elkhorn School Ws
Groundwater 694 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb) ✓
Prunedale School Ws
Groundwater 655 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb) ✓
Echo Valley School Ws
7 health-based Groundwater 579 people served
7 violations (5yr)
· 7 health-based · All resolved
Moss Landing School Ws **Closed**
Groundwater 575 people served
0 violations
Village Mobile Home Park
Groundwater 487 people served
0 violations
Prunedale Mwc
2 health-based Groundwater 277 people served
2 violations (5yr)
· 2 health-based · All resolved
Altman Plants Ws #04 -Esp 420 (Prev Cs1)
Groundwater 250 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb) ✓
Shippers Development
Groundwater 250 people served
0 violations
Countryside Estates Mwc
1 health-based Groundwater 243 people served
2 violations (5yr)
· 1 health-based
Lead tested: 0 ppb (limit: 15 ppb) ✓
Paradise Lake Mutual Water Co.
Groundwater 213 people served
0 violations
Moro Rd Ws #09
15 health-based Groundwater 210 people served
15 violations (5yr)
· 15 health-based · All resolved
Lead tested: 2.3 ppb (limit: 15 ppb) ✓
Paradise Rd Ws #09
1 health-based Groundwater 206 people served
2 violations (5yr)
· 1 health-based
Lead tested: 0 ppb (limit: 15 ppb) ✓
The Church Of God - Salinas Ws
Groundwater 200 people served
0 violations
Titus Park See Ambler Park Ws
Groundwater 200 people served
0 violations
Colonial Oak Wc Inc
3 health-based Groundwater 198 people served
4 violations (5yr)
· 3 health-based
Rolling Hills Rancho Wa
Groundwater under influence of surface water 185 people served
0 violations
Assisi Mwc
1 health-based Groundwater 126 people served
2 violations (5yr)
· 1 health-based
Lead tested: 0 ppb (limit: 15 ppb) ✓
Pesante Rd Ws #02
Groundwater 120 people served
0 violations
Hidden Canyon Ranch Mwc
Groundwater 116 people served
0 violations
Altman Plants Ws #03 - Espinosa 303
Groundwater 110 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb) ✓
Oak Heights W & R Co Inc
9 health-based Groundwater 105 people served
9 violations (5yr)
· 9 health-based · All resolved
Speigle Foods
Groundwater 100 people served
0 violations
Mel Finneriman
Groundwater 100 people served
0 violations
Santa Rita School
Groundwater 100 people served
0 violations
Rancho Borromeo Mwc
Groundwater 100 people served
0 violations
Lead tested: 0.6 ppb (limit: 15 ppb) ✓
Merrill Farms
Groundwater 100 people served
0 violations
San Miguel Ws #22
1 health-based Groundwater 93 people served
2 violations (5yr)
· 1 health-based
Lead tested: 0 ppb (limit: 15 ppb) ✓
Oak Manor Ws
1 health-based Groundwater 92 people served
2 violations (5yr)
· 1 health-based
Lead tested: 3 ppb (limit: 15 ppb) ✓
Spring Canyon Wa
7 health-based Groundwater 90 people served
8 violations (5yr)
· 7 health-based
Hidden Valley Wa
1 health-based Groundwater 87 people served
11 violations (5yr)
· 1 health-based
Castroville Blvd
Groundwater 84 people served
0 violations
Pajaro Valley Greenhouse Ws
1 health-based Groundwater 80 people served
3 violations (5yr)
· 1 health-based
Lead tested: 4.2 ppb (limit: 15 ppb) ✓
Blackie Rd Ws #05
Groundwater 78 people served
0 violations
Lead tested: 4 ppb (limit: 15 ppb) ✓
Arrowhead Ranch Ws
Groundwater 75 people served
0 violations
Harbor View Wa
1 health-based Groundwater 75 people served
2 violations (5yr)
· 1 health-based
Glenn Ave Ws #01
1 health-based Groundwater 73 people served
2 violations (5yr)
· 1 health-based
Associated Tagline Ws
Groundwater 70 people served
0 violations
Central Bay High School Ws
Groundwater 70 people served
0 violations
Calvary Church Inc Ws
Groundwater 68 people served
0 violations
Moro Cojo Mwa
1 health-based Groundwater 67 people served
2 violations (5yr)
· 1 health-based
Vierra Knolls Mwc
1 health-based Groundwater 66 people served
2 violations (5yr)
· 1 health-based
Vierra Vyn Knolls Wtr Co
Groundwater 66 people served
0 violations
Vierra Meadows Mwc
1 health-based Groundwater 65 people served
1 violation (5yr)
· 1 health-based · All resolved
Lead tested: 3.1 ppb (limit: 15 ppb) ✓
Garlen Court Ws
1 health-based Groundwater 65 people served
2 violations (5yr)
· 1 health-based
Leafwood Community Wa
1 health-based Groundwater 64 people served
2 violations (5yr)
· 1 health-based
Lead tested: 0 ppb (limit: 15 ppb) ✓
Ken Caldwell
Groundwater 60 people served
0 violations
Thimio Mwc
7 health-based Groundwater 59 people served
7 violations (5yr)
· 7 health-based · All resolved
Growers Transplanting Ws
1 health-based Groundwater 58 people served
2 violations (5yr)
· 1 health-based
Tierra Meadows Hoa Ws
Groundwater 58 people served
0 violations
Lead tested: 3 ppb (limit: 15 ppb) ✓
Woodland Heights Mwc
Groundwater 57 people served
0 violations
Lead tested: 1.2 ppb (limit: 15 ppb) ✓
Desmond Rd Ws #03
Groundwater 56 people served
0 violations
Jost Post Wa
Groundwater 56 people served
1 violation (5yr)
Ronald N Nunes
Groundwater 56 people served
0 violations
Espinosa Road Water System #4
Groundwater 50 people served
0 violations
Linda Vista Mutual Water Co 1
Groundwater 50 people served
0 violations
Pesante Rd Ws #06
1 health-based Groundwater 50 people served
2 violations (5yr)
· 1 health-based
Lead tested: 0 ppb (limit: 15 ppb) ✓
Holly Hills Motel
Groundwater 49 people served
0 violations
Blackie Rd Water System 9
Groundwater 49 people served
0 violations
Paradise Rd Ws #21
1 health-based Groundwater 48 people served
2 violations (5yr)
· 1 health-based
Lead tested: 0 ppb (limit: 15 ppb) ✓
Echo Valley Rd Ws #05
Groundwater 45 people served
0 violations
Paradise Rd Ws #05
Groundwater 42 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb) ✓
John Inglis Frozen Foods
Groundwater 40 people served
0 violations
Harrison Rd Ws #01
Groundwater 40 people served
1 violation (5yr)
Lead tested: 0 ppb (limit: 15 ppb) ✓
Vierra Canyon Ws #29
All resolved Groundwater 36 people served
1 violation (5yr)
· All resolved
Holly Hills Motel
Groundwater 35 people served
0 violations
San Juan Estates Ws
Groundwater 35 people served
0 violations
Orchard Ln Ws #02
Groundwater 32 people served
0 violations
Inter-Harvest Incorporated
Groundwater 30 people served
0 violations
Orchard Ln Ws #09
Groundwater 30 people served
0 violations
Let-Us-Pak
Groundwater 30 people served
0 violations
Palma High School
Groundwater 30 people served
0 violations
Altman Plants Ws #05 -Esp 325 (Prev Cs2)
Groundwater 25 people served
0 violations
Lead tested: 10 ppb (limit: 15 ppb) ✓
Altman Plants Ws #02 - Spence 20140
5 health-based Groundwater 25 people served
5 violations (5yr)
· 5 health-based · All resolved
Lead tested: 0 ppb (limit: 15 ppb) ✓
El Camino Real North System #7
Groundwater 25 people served
0 violations
American Legion #593 Ws
Groundwater 25 people served
0 violations
Ricca Dy
Groundwater 25 people served
0 violations
Schoch Brothers Dy
Groundwater 25 people served
0 violations
Growers Ice
Groundwater 25 people served
0 violations
Altman Plants Ws #06 - Esp 384
All resolved Groundwater 25 people served
3 violations (5yr)
· All resolved
Lead tested: 0 ppb (limit: 15 ppb) ✓
Corey Road Ws #1
Groundwater 25 people served
0 violations
Carriage Lane Nursery
Groundwater 25 people served
0 violations
La Tapatia Taqueria Ws
Groundwater 25 people served
0 violations
El Camino Rl No 38
Groundwater 25 people served
0 violations
Altman Plants Ws #01 - Spence 20460
3 health-based Groundwater 25 people served
3 violations (5yr)
· 3 health-based · All resolved
Lead tested: 0 ppb (limit: 15 ppb) ✓
Gularte Dairy Water System
Groundwater 25 people served
0 violations
Sherwood Dy
Groundwater 25 people served
0 violations
Blackie Road Water System #12
Groundwater 25 people served
0 violations
Noble Farms-Growers Transplant Ws
Groundwater 25 people served
0 violations
Lead tested: 2.8 ppb (limit: 15 ppb) ✓
Sala Dy
Groundwater 25 people served
0 violations
Gloria Morton
Groundwater 12 people served
0 violations
Contaminants Found
NitrateHealth-Based
At high levels, nitrate can cause blue baby syndrome in infants.
43 violations
All resolved
ArsenicHealth-Based
A naturally occurring element that can cause cancer and other health effects at high levels.
39 violations
All resolved
LEAD AND COPPER RULE REVISIONSHealth-Based
37 violations
Has active
Lead and Copper RuleMonitoring
Lead and copper testing requirement. Lead exposure can cause developmental harm in children.
8 violations
Has active
Lead & Copper Levels
Lead (Pb)
Within limit0 ppb measured
Action level: 15 ppb
Sampled: Jul 2025
Copper (Cu)
Exceeds limit1740 ppb measured
Action level: 1300 ppb
Sampled: Jul 2025
How Does This Compare?
San Jose (93907) has more violations than 96% of US ZIP codes. The national average is 18.87 violations per ZIP over 5 years. This ZIP has 127.
Fewer violations 96th 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
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.