Fresno County, California
102 ZIP codes · Avg score 70/100 · Grade B · Updated 2026-06-03
The 102 water systems serving Fresno County show strong compliance with federal drinking water standards.
How Fresno County Compares
How Fresno County Compares
Fresno County scores 3 points below the California state average (73/100) and 2 points above the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Fresno County, California
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 12.3 (asthma 9.9%, diabetes 12.7%)
Estimated additional annual cost per homeowner: $1,636, driven primarily by wildfire
Infrastructure: 0.319% avg pipe failure probability, 18% of ZIPs at high risk
Violation History (2021–2025)
↑ Worsening trendEPA violation counts by year across Fresno County water systems. Health-based shown in red, total in blue.
Peak year: 2024 with 173 violations. Past 5 years: 235 total (235 health-based). Health-based violations are rising versus the prior 2-year window — worth closer monitoring.
Source: EPA SDWIS historical violations. Data may lag 6–12 months for the most recent year.
County Health Indicators vs National Average
Black markers indicate national averages. Source: CDC PLACES, Census ACS.
Infrastructure Overview
Sources: Census ACS (housing age), EPA SDWIS (infrastructure risk model), state bridge inspection data.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $1,636
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Water Safety Affordability
How much it costs to fix water issues relative to home values in Fresno County
Remediation costs are relatively manageable for most homeowners in Fresno County, representing a small fraction of property value.
Remediation includes water filtration, lead abatement, radon mitigation, and flood protection where applicable. Source: Census ACS, EPA SDWIS.
Health Outcomes vs National Average
CDC PLACES data for Fresno County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water Systems with Most Violations
Top 5 systems in Fresno County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | City of Fresno | 545,716 | 317 |
| 2 | California State University Fresno | 41,000 | 290 |
| 3 | Bakman Water Company | 17,393 | 290 |
| 4 | Malaga County Water District | 5,979 | 290 |
| 5 | Riverstone/rootcreek Water District | 5,507 | 290 |
63 total water systems serve Fresno County.
All ZIP Codes in Fresno County
102 ZIP codes tracked in Fresno County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 93625 | Fowler | 83 | B | 1 | $369K |
| 2 | 93641 | Miramonte | 83 | B | 0 | — |
| 3 | 93651 | Prather | 83 | B | 0 | $424K |
| 4 | 93602 | Auberry | 81 | B | 1 | $351K |
| 5 | 93660 | San Joaquin | 80 | B | 0 | $271K |
| 6 | 93242 | Laton | 78 | B | 3 (1 health) | $347K |
| 7 | 93664 | Shaver Lake | 78 | B | 0 | $618K |
| 8 | 93656 | Riverdale | 77 | B | 1 (1 health) | $272K |
| 9 | 93606 | Biola | 76 | B | 1 | $237K |
| 10 | 93622 | Firebaugh | 75 | B | 6 (2 health) | $236K |
| 11 | 93640 | Mendota | 75 | B | 0 | $255K |
| 12 | 93650 | Fresno | 75 | B | 5 (2 health) | $306K |
| 13 | 93701 | Fresno | 75 | B | 5 (2 health) | $208K |
| 14 | 93702 | Fresno | 75 | B | 5 (2 health) | $212K |
| 15 | 93703 | Fresno | 75 | B | 5 (2 health) | $250K |
| 16 | 93706 | Fresno | 75 | B | 5 (2 health) | $228K |
| 17 | 93721 | Fresno | 75 | B | 5 (2 health) | $219K |
| 18 | 93722 | Fresno | 75 | B | 5 (2 health) | $351K |
| 19 | 93725 | Fresno | 75 | B | 5 (2 health) | $262K |
| 20 | 93727 | Fresno | 75 | B | 5 (2 health) | $370K |
| 21 | 93737 | Fresno | 75 | B | 5 (2 health) | $471K |
| 22 | 93613 | Clovis | 73 | B | 6 (2 health) | — |
| 23 | 93707 | Fresno | 73 | B | 5 (2 health) | — |
| 24 | 93708 | Fresno | 73 | B | 5 (2 health) | — |
| 25 | 93709 | Fresno | 73 | B | 5 (2 health) | — |
| 26 | 93712 | Fresno | 73 | B | 5 (2 health) | — |
| 27 | 93714 | Fresno | 73 | B | 5 (2 health) | — |
| 28 | 93715 | Fresno | 73 | B | 5 (2 health) | — |
| 29 | 93716 | Fresno | 73 | B | 5 (2 health) | — |
| 30 | 93717 | Fresno | 73 | B | 5 (2 health) | — |
| 31 | 93718 | Fresno | 73 | B | 5 (2 health) | — |
| 32 | 93723 | Fresno | 73 | B | 5 (2 health) | $460K |
| 33 | 93724 | Fresno | 73 | B | 5 (2 health) | — |
| 34 | 93729 | Fresno | 73 | B | 5 (2 health) | — |
| 35 | 93730 | Fresno | 73 | B | 5 (2 health) | $708K |
| 36 | 93740 | Fresno | 73 | B | 5 (2 health) | — |
| 37 | 93741 | Fresno | 73 | B | 5 (2 health) | — |
| 38 | 93744 | Fresno | 73 | B | 5 (2 health) | — |
| 39 | 93745 | Fresno | 73 | B | 5 (2 health) | — |
| 40 | 93747 | Fresno | 73 | B | 5 (2 health) | — |
| 41 | 93750 | Fresno | 73 | B | 5 (2 health) | — |
| 42 | 93755 | Fresno | 73 | B | 5 (2 health) | — |
| 43 | 93760 | Fresno | 73 | B | 5 (2 health) | — |
| 44 | 93761 | Fresno | 73 | B | 5 (2 health) | — |
| 45 | 93764 | Fresno | 73 | B | 5 (2 health) | — |
| 46 | 93765 | Fresno | 73 | B | 5 (2 health) | — |
| 47 | 93771 | Fresno | 73 | B | 5 (2 health) | — |
| 48 | 93772 | Fresno | 73 | B | 5 (2 health) | — |
| 49 | 93773 | Fresno | 73 | B | 5 (2 health) | — |
| 50 | 93774 | Fresno | 73 | B | 5 (2 health) | — |
| 51 | 93775 | Fresno | 73 | B | 5 (2 health) | — |
| 52 | 93776 | Fresno | 73 | B | 5 (2 health) | — |
| 53 | 93777 | Fresno | 73 | B | 5 (2 health) | — |
| 54 | 93778 | Fresno | 73 | B | 5 (2 health) | — |
| 55 | 93779 | Fresno | 73 | B | 5 (2 health) | — |
| 56 | 93786 | Fresno | 73 | B | 5 (2 health) | — |
| 57 | 93790 | Fresno | 73 | B | 5 (2 health) | — |
| 58 | 93791 | Fresno | 73 | B | 5 (2 health) | — |
| 59 | 93792 | Fresno | 73 | B | 5 (2 health) | — |
| 60 | 93793 | Fresno | 73 | B | 5 (2 health) | — |
| 61 | 93794 | Fresno | 73 | B | 5 (2 health) | — |
| 62 | 93844 | Fresno | 73 | B | 5 (2 health) | — |
| 63 | 93888 | Fresno | 73 | B | 5 (2 health) | — |
| 64 | 93210 | Coalinga | 72 | B | 3 (3 health) | $258K |
| 65 | 93616 | Del Rey | 72 | B | 0 | $220K |
| 66 | 93624 | Five Points | 72 | B | 0 | — |
| 67 | 93611 | Clovis | 70 | B | 6 (2 health) | $458K |
| 68 | 93612 | Clovis | 70 | B | 6 (2 health) | $312K |
| 69 | 93619 | Clovis | 70 | B | 6 (2 health) | $579K |
| 70 | 93649 | Piedra | 70 | B | 1 | — |
| 71 | 93704 | Fresno | 70 | B | 5 (2 health) | $366K |
| 72 | 93705 | Fresno | 70 | B | 5 (2 health) | $281K |
| 73 | 93710 | Fresno | 70 | B | 5 (2 health) | $349K |
| 74 | 93711 | Fresno | 70 | B | 5 (2 health) | $470K |
| 75 | 93720 | Fresno | 70 | B | 5 (2 health) | $458K |
| 76 | 93726 | Fresno | 70 | B | 5 (2 health) | $272K |
| 77 | 93728 | Fresno | 70 | B | 5 (2 health) | $240K |
| 78 | 93654 | Reedley | 69 | C | 3 (1 health) | $335K |
| 79 | 93626 | Friant | 68 | C | 3 | $595K |
| 80 | 93605 | Big Creek | 67 | C | 3 (1 health) | — |
| 81 | 93630 | Kerman | 67 | C | 8 (1 health) | $343K |
| 82 | 93648 | Parlier | 67 | C | 2 (1 health) | $240K |
| 83 | 93662 | Selma | 67 | C | 6 (1 health) | $298K |
| 84 | 93668 | Tranquillity | 67 | C | 3 (1 health) | $333K |
| 85 | 93609 | Caruthers | 66 | C | 5 (5 health) | $263K |
| 86 | 93646 | Orange Cove | 66 | C | 2 (1 health) | $241K |
| 87 | 93657 | Sanger | 66 | C | 9 (3 health) | $383K |
| 88 | 93633 | Kings Canyon National Pk | 63 | C | 0 | — |
| 89 | 93667 | Tollhouse | 63 | C | 0 | $355K |
| 90 | 93675 | Squaw Valley | 63 | C | 0 | $284K |
| 91 | 93234 | Huron | 57 | C | 3 (3 health) | $237K |
| 92 | 93237 | Kaweah | 53 | D | 0 | $406K |
| 93 | 93262 | Sequoia National Park | 53 | D | 0 | — |
| 94 | 93607 | Burrel | 53 | D | 0 | — |
| 95 | 93608 | Cantua Creek | 53 | D | 0 | $145K |
| 96 | 93621 | Dunlap | 53 | D | 0 | — |
| 97 | 93634 | Lakeshore | 53 | D | 0 | — |
| 98 | 93642 | Mono Hot Springs | 53 | D | 0 | — |
| 99 | 93652 | Raisin City | 53 | D | 0 | $194K |
| 100 | 93673 | Traver | 53 | D | 0 | $179K |
| 101 | 93628 | Hume | 50 | D | 0 | — |
| 102 | 93627 | Helm | 48 | D | 2 (1 health) | — |
Recommended Buyer Guides for Fresno County
Filtered against federal data, fitted to local risks.
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
- Best HEPA Air Purifiers for Wildfire Smoke — Wildfire is the top compound risk factor
Deep Dive Reports
Detailed analysis for Fresno County, California
Overview
Fresno County in California covers 102 ZIP codes with an average Home Safety Score of B (70/100).
82 of 102 ZIP codes have recorded EPA violations. 150 health-based violations have been documented.
← Back to California water quality report
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Home values: U.S. Census Bureau ACS (median estimates by ZCTA)
Updated daily.