Water Quality in San Jose, CA (93257)

EPA violation data for public water systems serving ZIP code 93257.

Based on EPA compliance data. Not a substitute for an official water quality report from your utility.

80,467

Population

156

Water Systems

87

Violations (5yr)

43

Health-Based

Location

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Water Systems Serving This Area (156)

Cws - Visalia

Groundwater 148,496 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb)

Tulare, City Of

Groundwater 72,131 people served
0 violations

Porterville, City Of

1 health-based
Groundwater 63,164 people served
2 violations (5yr) · 1 health-based

Clm - Hobo Campground

Groundwater 5,200 people served
0 violations

Casillas Water System

Groundwater 3,000 people served
0 violations

Tule River Reservation Main

6 health-based
Surface water 2,560 people served
31 violations (5yr) · 6 health-based
Lead tested: 5 ppb (limit: 15 ppb)

Rowland Wtr Co

Groundwater 1,500 people served
0 violations

Usfs - French Gulch Campground

Groundwater 1,000 people served
0 violations

Vandalia School

Groundwater 887 people served
0 violations

Burton School

Groundwater 800 people served
0 violations

Clm - Sandy Flat Campground

Groundwater 500 people served
0 violations

West Putnam School - Inactive

Groundwater 500 people served
0 violations

Lakeside Trailer Park

Groundwater 500 people served
0 violations

Alta Vista Elem School Dist

Groundwater 446 people served
0 violations

Rowland Water Co Nance Tract

Groundwater 350 people served
0 violations

Rowland Water Co Tract 213

Groundwater 350 people served
0 violations

Rowland Mulberry Tract

Groundwater 350 people served
0 violations

Porterville-Jones Corner

1 health-based
Groundwater 339 people served
2 violations (5yr) · 1 health-based
Lead tested: 0 ppb (limit: 15 ppb)

Rockford School

1 health-based
Groundwater 321 people served
2 violations (5yr) · 1 health-based

Pan American Ballroom

Groundwater 300 people served
0 violations

Strathmore Minimart

Groundwater 300 people served
0 violations

Pleasant View School

Groundwater 300 people served
0 violations

Bob'S Tiny Mart

1 health-based
Groundwater 265 people served
1 violation (5yr) · 1 health-based · All resolved

Hope Elementary School

18 health-based
Groundwater 255 people served
18 violations (5yr) · 18 health-based · All resolved
Lead tested: 0 ppb (limit: 15 ppb)

Summitt Charter Academy

Groundwater 250 people served
0 violations

Pleasant View West School

11 health-based
Groundwater 220 people served
11 violations (5yr) · 11 health-based · All resolved
Lead tested: 0 ppb (limit: 15 ppb)

Hari'S Market

All resolved
Groundwater 212 people served
1 violation (5yr) · All resolved

Success Market

All resolved
Groundwater 200 people served
1 violation (5yr) · All resolved

Usfs/Logger-Aspen

Surface water 200 people served
0 violations

Rustlers

Groundwater 190 people served
0 violations

Westfield School

Groundwater 180 people served
0 violations

Panaderia La Cabana

All resolved
Groundwater 155 people served
2 violations (5yr) · All resolved

Ns Mini Mart

All resolved
Groundwater 140 people served
2 violations (5yr) · All resolved

Vandalia Irrigation District

Groundwater 100 people served
0 violations

Usfs-Jerkey Meadow Trailhead / Uhl Wc

Groundwater 96 people served
0 violations

Beverly Grand Mutual Water

Groundwater 92 people served
0 violations

Porterville Drive In

Groundwater 90 people served
0 violations

Spinner'S Race Track

Groundwater 90 people served
0 violations

Old Isabella Road Water System

Groundwater 90 people served
0 violations

Akin Water Company

All resolved
Purchased groundwater 86 people served
1 violation (5yr) · All resolved

Juranda Water Company

Groundwater 80 people served
0 violations

Usfs-Kennedy Campground

Groundwater 78 people served
0 violations

Shiloh Water Co.

Groundwater 75 people served
0 violations

Lake Success Mobile Lodge

1 health-based
Groundwater 75 people served
2 violations (5yr) · 1 health-based
Lead tested: 0 ppb (limit: 15 ppb)

Porterville Racquet Club - Inactive

Groundwater 75 people served
0 violations

Spallina Water Company

Groundwater 70 people served
0 violations

Crystal Court

Groundwater 70 people served
0 violations

Cottage Court

Groundwater 63 people served
0 violations

Eagle'S Nest Resort

Groundwater 60 people served
0 violations

Tharp Real Properties

Groundwater 60 people served
0 violations

E.M. Tharp, Inc.

Groundwater 50 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb)

The Seafood Cafe

Groundwater 50 people served
0 violations

Citrus South Tule School

Groundwater 50 people served
0 violations

Rup'S Market

Groundwater 50 people served
0 violations

Acid

Groundwater 50 people served
0 violations

Sunny Acres Preschool

Groundwater 50 people served
0 violations

Pavey'S Market

Groundwater 50 people served
0 violations

Army Corps Engs-Rocky Hill

Groundwater 50 people served
0 violations

Walnut Grove Trailer Park

Groundwater 48 people served
0 violations

Mama Marcina S

Groundwater 46 people served
0 violations

Valley Care Center

Groundwater 45 people served
0 violations

Ronald Sheldon

Groundwater 45 people served
0 violations

Tule River Cow Mountain

Groundwater 45 people served
0 violations

Teapot Dome Water Co

Groundwater 43 people served
0 violations

Sierra Mutual Water Company

2 health-based
Groundwater 43 people served
2 violations (5yr) · 2 health-based · All resolved
Lead tested: 0 ppb (limit: 15 ppb)

Foothill Apartments

All resolved
Groundwater 41 people served
1 violation (5yr) · All resolved

Watertek Inc.

Groundwater 40 people served
0 violations

Pastime Bar & Grill

Groundwater 40 people served
0 violations

Prentice Water Company

Groundwater 40 people served
0 violations

The Roundup

Groundwater 35 people served
0 violations

Blackrock Station

Groundwater 32 people served
0 violations

Horse Meadow Work Center

Surface water 30 people served
0 violations

East Vandalia Water Co.

Groundwater 30 people served
0 violations

Success Mutual Water Company

Groundwater 30 people served
0 violations

Usfs-Blackrock Trailhead

Groundwater 30 people served
0 violations

Porterville Athletic Club

Groundwater 30 people served
0 violations

Deer Creek/Leavis Campground

Groundwater 30 people served
0 violations

Usfs-Democrat Fire Station Ws

Groundwater 29 people served
0 violations

Roundup

Groundwater 29 people served
0 violations

Usfs Sequoia Nf

Groundwater 25 people served
0 violations

Usfs Sequoia Nf

Groundwater 25 people served
0 violations

Usfs Sequoia Nf

Groundwater 25 people served
0 violations

Usfs Sequoia Nf

Groundwater 25 people served
0 violations

Usfs Sequoia Nf

Surface water 25 people served
0 violations

Usfs Sequoia Nf

Groundwater 25 people served
0 violations

Usfs-Johnsondale Work Center

Groundwater 25 people served
0 violations

Usfs Sequoia Nf

Groundwater 25 people served
0 violations

El Durango Water System

Groundwater 25 people served
0 violations

Usfs Sequoia Nf

Groundwater 25 people served
0 violations

Porter Vista Public Util.Dist

Groundwater 25 people served
0 violations

Usfs Sequoia Nf

Groundwater 25 people served
0 violations

Tule River Apple Valley

Groundwater 25 people served
7 violations (5yr)
Lead tested: 5 ppb (limit: 15 ppb)

Frank'S Stop & Go

Groundwater 25 people served
0 violations

Usfs Sequoia Nf

Groundwater 25 people served
0 violations

Usfs Sequoia Nf

Groundwater 25 people served
0 violations

Usfs Sequoia Nf

Groundwater 25 people served
0 violations

Usfs Sequoia Nf

Groundwater 25 people served
0 violations

Usfs-Deer Creek/Leavis Campground

Groundwater 25 people served
0 violations

Usfs Kernville 13-56-15089

Groundwater 25 people served
0 violations

Suhovy Water System - Inactive

Groundwater 25 people served
0 violations

Ingraham Properties

Groundwater 25 people served
0 violations

Usfs-Beach Meadow

Groundwater 25 people served
0 violations

Truckers Mini Mart

Groundwater 25 people served
0 violations

Usfs Sequoia Nf

Groundwater 25 people served
0 violations

Usfs Sequoia Nf

Groundwater 25 people served
0 violations

Usace - Tule Recreation Area

1 health-based
Groundwater 25 people served
1 violation (5yr) · 1 health-based · All resolved

Lake Express Market

Groundwater 25 people served
0 violations

Usfs Sequoia Nf

Groundwater 25 people served
0 violations

Usfs Sequoia Nf

Groundwater 25 people served
0 violations

Spiegelberg Water System

Groundwater 25 people served
0 violations

Usfs Sequoia Nf

Groundwater 25 people served
0 violations

Usfs Sequoia Nf

Groundwater 25 people served
0 violations

Usfs Sequoia Nf

Groundwater 25 people served
0 violations

Usfs Sequoia Nf

Groundwater 25 people served
0 violations

Usfs Sequoia Nf

Groundwater 25 people served
0 violations

Usfs Sequoia Nf

Groundwater 25 people served
0 violations

Usfs Sequoia Nf

Groundwater 25 people served
0 violations

Usfs Uhl Ranger 13-53-1834

Groundwater 25 people served
0 violations

Usfs Sequoia Nf

Groundwater 25 people served
0 violations

Usfs Sequoia Nf

Groundwater 25 people served
0 violations

Usfs Sequoia Nf

Groundwater 25 people served
0 violations

Usfs Sequoia Nf

Surface water 25 people served
0 violations

Tim & Marias

Groundwater 25 people served
0 violations

Usfs Sequoia Nf

Groundwater 25 people served
0 violations

Usfs Sequoia Nf

Groundwater 25 people served
0 violations

Usfs Sequoia Nf

Groundwater 25 people served
0 violations

Usfs Sequoia Nf

Groundwater 25 people served
0 violations

Usfs Sequoia Nf

Groundwater 25 people served
0 violations

Usfs Sequoia Nf

Groundwater 25 people served
0 violations

Usfs Sequoia Nf

Groundwater 25 people served
0 violations

Usfs Sequoia Nf

Groundwater 25 people served
0 violations

Usfs Sequoia Nf

Groundwater 25 people served
0 violations

Usfs Sequoia Nf

Groundwater 25 people served
0 violations

Usfs Sequoia Nf

Groundwater 25 people served
0 violations

Curve Inn Cafe

Groundwater 25 people served
0 violations

Sally Trach Water System

Groundwater 25 people served
0 violations

Usfs Sequoia Nf

Groundwater 25 people served
0 violations

Usfs Sequoia Nf

Groundwater 25 people served
0 violations

Casey'S Water System

Groundwater 24 people served
0 violations

Army Corps Of Engineers

Groundwater 20 people served
0 violations

Small Steps Child Care Center

Groundwater 14 people served
0 violations

Usfs - Lk Isabella Office Water System

Groundwater 12 people served
0 violations

Usfs-Blackrock Station

Groundwater 12 people served
0 violations

Usfs-Hot Springs Ranger Station / Uhl Wc

Groundwater 11 people served
0 violations

Usfs Sequoia Nf

Groundwater 0
0 violations

Usfs Sequoia Nf

Surface water 0
0 violations

Usfs Sequoia Nf

Groundwater 0
0 violations

Usfs Sequoia Nf

Groundwater 0
0 violations

Usfs Sequoia Nf

Groundwater 0
0 violations

Usfs Sequoia Nf

Groundwater 0
0 violations

Usfs Sequoia Nf

Groundwater 0
0 violations

Usfs Sequoia Nf

Groundwater 0
0 violations

Gilbert Mutual

Groundwater 0
0 violations

Usfs Sequoia Nf

Groundwater 0
0 violations

Usfs Sequoia Nf

Surface water 0
0 violations

Usfs Sequoia Nf

Groundwater 0
0 violations

Contaminants Found

NitrateHealth-Based

At high levels, nitrate can cause blue baby syndrome in infants.

31 violations
All resolved
Revised Total Coliform RuleHealth-Based

Missed testing deadlines — not a detection of bacteria.

16 violations
All resolved
LEAD AND COPPER RULE REVISIONSHealth-Based
8 violations
Has active
Surface Water Treatment RuleHealth-Based
5 violations
All resolved
Groundwater RuleHealth-Based
3 violations
Has active
ChlorineMonitoring

Used to disinfect water — generally safe at regulated levels.

3 violations
All resolved
Total Haloacetic Acids (HAA5)Monitoring
3 violations
Has active
TTHMMonitoring
3 violations
Has active
Public NoticeMonitoring
3 violations
Has active
2,3,7,8-TCDDMonitoring
3 violations
All resolved
ArsenicMonitoring

A naturally occurring element that can cause cancer and other health effects at high levels.

2 violations
All resolved
UnknownMonitoring
2 violations
All resolved
EthylbenzeneMonitoring
1 violation
All resolved
Combined Radium (-226 and -228)Monitoring
1 violation
All resolved
Consumer Confidence RuleMonitoring

Annual water quality report delivery requirement.

1 violation
All resolved

Lead & Copper Levels

Lead (Pb)

Within limit
0 ppb measured Action level: 15 ppb

Sampled: Jan 2025

How Does This Compare?

San Jose (93257) has more violations than 95% of US ZIP codes. The national average is 18.87 violations per ZIP over 5 years. This ZIP has 87.

Fewer violations 95th 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.

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