ZIP Code 93305 Water Quality & Testing Report
Bakersfield, CA · Kern County County · Updated for 2026
Compiled & verified by Sahajul Haque from official EPA SDWIS recordsIs Tap Water Safe to Drink in ZIP 93305 (Bakersfield, CA)?
Yes, tap water in ZIP code 93305 (Bakersfield, CA) is safe to drink under EPA Safe Drinking Water Act standards. Supplied by Cws - Bakersfield, the area earns an EPA Safety Grade of B (76/100) with 4 health violations, 1.3 ppb lead, and hard (128 mg/L / 7.5 GPG) water.
Water Safety Grade
Good — Minor issues on record
Health Violations
4
Total Violations
5
Lead Risk
High
Contaminants
2
Active Water Quality Issues Detected
EPA records show 2 unresolved violations. Contact Cws - Bakersfield for current status.
About Tap Water in ZIP Code 93305
Tap water in ZIP code 93305 (Bakersfield, CA) is distributed by Cws - Bakersfield (EPA ID: CA1510003), serving approximately 267,881 residents. Based on EPA Safe Drinking Water Act compliance records, this system receives a water safety grade of B with a composite quality score of 76/100.
Water System
Cws - Bakersfield
EPA ID: CA1510003
Water Source
Surface Water
Population Served
267,881 residents
County
Kern County County, California
Lead Levels in ZIP 93305
EPA action level: 15 ppb | Public health goal: 0 ppb
Lead Level: 1.3 ppb — Very Low
Lead exposure risk in 93305 is rated High. EPA models estimate a 55% exposure probability based on housing and infrastructure age.
From annual CCR filing
EPA model estimate based on housing age and infrastructure
Water Hardness & Mineral Content
Grains per gallon (GPG) & Parts per million (PPM / mg/L)
Water in ZIP 93305 is Hard (128 mg/L / 7.5 GPG). Residents may notice white mineral spots on glassware, reduced soap efficiency, and mineral scale on faucets and showerheads.
Grains per gallon
Parts per million CaCO3
Official EPA SDWIS Database Entry
Utility: Cws - Bakersfield · PWSID: CA1510003
Violation History
Past 5 years — EPA SDWIS data
Cws - Bakersfield has recorded 4 health-based violations out of 5 total violations over the past 5 years. 2 violations remain unresolved in EPA tracking records.
Regulatory compliance risk for this utility is rated Critical based on past reporting and enforcement records.
Contaminants Detected
Contaminants with health-based violations on record
EPA records identify 2 contaminants with health-based violations in the past 5 years: Total Trihalomethanes (TTHM), Haloacetic Acids (HAA5).
From Consumer Confidence Report:
Total haloacetic acids (THAA) (40 ppb); Total trihalomethane (TTHM) (42 ppb); Arsenic (50 ppb); Nickel (53 ppb); Nitrate as N (5.01 ppm)
⚖ Enforcement Actions
Water Source & Environmental Factors
Surface Water
This system draws water from lakes, rivers, or reservoirs. Surface water is treated to remove sediment, microorganisms, and chemical contaminants before reaching taps.
Moderate potential
Estimated annual flood-related costs per property
% of household income spent on energy — indicator of older infrastructure
EPA Radon Zone 2 — moderate radon potential. The EPA recommends testing your home regardless of zone designation.
Water Quality Testing in ZIP 93305
Tap Water & Well Testing Recommendations
Residents in ZIP code 93305 served by Cws - Bakersfield can test tap water or private well systems to verify water purity. Testing detects hidden contaminants before they impact family health.
Tap Water Testing Steps
- 1.Conduct a certified lead check if your home was constructed before 1986.
- 2.Use certified lab testing kits rather than uncalibrated test strips for regulated compliance.
- 3.Sample water from both your kitchen faucet and water heater to compare line purity.
Private Well Testing Steps
- •Test for Coliform bacteria and Nitrates annually.
- •Test for heavy metals, radon, and PFAS every 3 years.
- •Send samples to a state-certified drinking water laboratory recognized by California State Water Resources Control Board.
🛡 What Should You Do? — ZIP 93305 Recommendations
Your water quality is good
- ✓ Run cold water for 30 seconds each morning before use — especially if pipes are old
- ✓ Request your annual Consumer Confidence Report from Cws - Bakersfield
- ✓ If your home was built before 1986, consider testing your own tap for lead
- ✓ Use a pitcher filter (NSF/ANSI 42 certified) for improved taste
Recommended Taste & Safety Filter:
NSF/ANSI 53 Certified Pitcher Filter
Best for removing aesthetic chlorine, odors, and low-level heavy metals.
Frequently Asked Questions — ZIP 93305 Water Quality
Is tap water safe to drink in ZIP code 93305?+
How do I get my water tested in ZIP 93305 (Bakersfield, CA)?+
How hard is the tap water in 93305?+
Should I test private well water in 93305?+
What is the lead level in 93305 tap water?+
Is there an active boil water notice in 93305?+
Who provides tap water to 93305?+
What water filter should I use in 93305?+
Data Sources & Methodology
Water quality data for ZIP code 93305 is compiled from the EPA Safe Drinking Water Information System (SDWIS), EPA ECHO enforcement database, UCMR5 unregulated contaminant monitoring, and Consumer Confidence Reports filed by Cws - Bakersfield. Safety scores are composite metrics derived from violation history, lead levels, enforcement actions, and infrastructure risk indicators. Data reflects a 5-year monitoring window. Last dataset update: 2024. View EPA source data →