Water Quality in Fresno, CA (93721)
EPA violation data for public water systems serving ZIP code 93721.
Past Health-Based Violations
28 health-based violations were found in the past 5 years, meaning contaminant levels exceeded federal safety limits. All have since been resolved. There are also 3 monitoring/reporting violations.
More violations than 85% of US ZIP codes.
Based on EPA compliance data. Not a substitute for an official water quality report from your utility.
7,225
Population
98
Water Systems
31
Violations (5yr)
28
Health-Based
Location
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Water Systems Serving This Area (98)
City Of Fresno
Surface water 545,716 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb) ✓
City Of Clovis
Surface water 130,130 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb) ✓
Fresno County Water Works
Groundwater 6,374 people served
0 violations
Camp Fresno Water System
Groundwater 5,600 people served
0 violations
Fresno Co Waterworks Dist 25
Groundwater 5,450 people served
0 violations
Fresno County Water Works
Groundwater 4,753 people served
0 violations
Fresno County Water Works
Groundwater 2,958 people served
0 violations
Fcwwd 41/Shaver Lake
Groundwater 2,722 people served
0 violations
Lead tested: 8 ppb (limit: 15 ppb) ✓ Copper tested: 5100 ppb (limit: 1300 ppb)
Fresno County Water Works
Groundwater 2,454 people served
0 violations
Fresno County Water Works
Groundwater 2,006 people served
0 violations
Fcsa 47 - Quail Lake Estates
Groundwater 1,988 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb) ✓
Fresno Co Waterworks Dist 21
Groundwater 1,800 people served
0 violations
Fresno Co Waterworks Dist 23
Groundwater 1,650 people served
0 violations
Fresno County Water Works
Groundwater 1,341 people served
0 violations
Fresno County Water Works
Groundwater 1,225 people served
0 violations
Fcsa 34 - Millerton New Town
4 health-based Surface water 1,117 people served
5 violations (5yr)
· 4 health-based · All resolved
Lead tested: 1.2 ppb (limit: 15 ppb) ✓
Fresno County Water Works
Groundwater 959 people served
0 violations
Fresno County Water Works
Groundwater 774 people served
0 violations
Juvenile Justice Campus
All resolved Groundwater 565 people served
1 violation (5yr)
· All resolved
Lead tested: 0 ppb (limit: 15 ppb) ✓
Fcsa 32 - Cantua Creek
8 health-based Surface water 462 people served
8 violations (5yr)
· 8 health-based · All resolved
Fcsa 49 - Five Points
4 health-based Surface water 440 people served
4 violations (5yr)
· 4 health-based · All resolved
Fcsa 05 - Wildwood Island
Groundwater 417 people served
0 violations
Lead tested: 6.3 ppb (limit: 15 ppb) ✓
Fcsa 39 - A And B
Purchased groundwater 395 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb) ✓
Clover Meadow Camp Ground
Groundwater 350 people served
0 violations
Fcsa 44d - Monte Verdi
Groundwater 350 people served
0 violations
Lead tested: 3.7 ppb (limit: 15 ppb) ✓
North Fork Ranger Station
Surface water 300 people served
0 violations
Fcwwd 42/Alluvial & Fancher
1 health-based Groundwater 291 people served
1 violation (5yr)
· 1 health-based · All resolved
Lead tested: 1.7 ppb (limit: 15 ppb) ✓
Fcsa 30 - El Porvenir
8 health-based Surface water 241 people served
8 violations (5yr)
· 8 health-based · All resolved
Fcoe Scout Island
All resolved Groundwater 205 people served
1 violation (5yr)
· All resolved
Fcpr/Laton-Kingston Park
Groundwater 200 people served
0 violations
Fcwwd 40 - Shaver Springs
Groundwater 196 people served
0 violations
Lead tested: 1.6 ppb (limit: 15 ppb) ✓
Fcwwd 38/Sky Harbour
Groundwater 185 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb) ✓
Fcsa 43 - Raisin City
Groundwater 182 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb) ✓
Usfs North Fork 15-55-7060
Surface water 161 people served
0 violations
Comfort Inn & Suites
Groundwater 150 people served
0 violations
Fcsa 10 - Cumorah Knolls
Groundwater 132 people served
0 violations
Lead tested: 3.7 ppb (limit: 15 ppb) ✓
Fcwwd 37/Mile High
Groundwater 129 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb) ✓ Copper tested: 3100 ppb (limit: 1300 ppb)
Fcsa 14 - Belmont Manor
Groundwater 115 people served
0 violations
Fcpg/Lost Lake Recreation Area
Groundwater 109 people served
0 violations
Fcsa 01 - Tamarack
Groundwater 106 people served
0 violations
Fcpg/Kearney Park
Groundwater 103 people served
0 violations
Fcpg/Avocado Lake Park
Groundwater 102 people served
0 violations
Indian Flat Campground
Groundwater 100 people served
0 violations
Jerseydale Campground - Usfs
Groundwater 100 people served
0 violations
Fcsa 10a - Mansionette Estates
3 health-based Groundwater 81 people served
3 violations (5yr)
· 3 health-based · All resolved
Lead tested: 0 ppb (limit: 15 ppb) ✓
Usfs Trimmer Rs 15-54-606
Groundwater 60 people served
0 violations
Fcpg/Choinumni Campground
Groundwater 53 people served
0 violations
Fcsa 34b - Ventana Hills
Groundwater 48 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb) ✓
Fcsa 23 - Exchequer Heights
Groundwater 45 people served
0 violations
Placer Campground
Groundwater 35 people served
0 violations
Fcsa 44c - Riverview Estates
Groundwater 34 people served
0 violations
Lead tested: 2.6 ppb (limit: 15 ppb) ✓
R B George
Groundwater 31 people served
0 violations
American Avenue Landfill
Groundwater 29 people served
0 violations
Usfs Sierra Nf
Groundwater 25 people served
0 violations
Usfs Sierra Nf
Groundwater 25 people served
0 violations
Usfs Sierra Nf
Surface water 25 people served
0 violations
Usfs Sierra Nf
Groundwater 25 people served
0 violations
Usfs Sierra Nf
Groundwater 25 people served
0 violations
Usfs Sierra Nf
Groundwater 25 people served
0 violations
Usfs Sierra Nf
Groundwater 25 people served
0 violations
Usfs Sierra Nf
Groundwater 25 people served
0 violations
Usfs Sierra Nf
Surface water 25 people served
0 violations
Usfs Sierra Nf
Groundwater 25 people served
0 violations
Usfs Sierra Nf
Groundwater 25 people served
0 violations
Usfs Sierra Nf
Groundwater 25 people served
0 violations
Usfs Sierra Nf
Surface water 25 people served
0 violations
Usfs Sierra Nf
Groundwater 25 people served
0 violations
Usfs Sierra Nf
Groundwater 25 people served
0 violations
Usfs Sierra Nf
Groundwater 25 people served
0 violations
Usfs Sierra Nf
Groundwater 25 people served
0 violations
Usfs Sierra Nf
Surface water 25 people served
0 violations
Usfs Sierra Nf
Groundwater 25 people served
0 violations
Usfs Sierra Nf
Groundwater 25 people served
0 violations
Usfs Sierra Nf
Groundwater 25 people served
0 violations
Usfs Sierra Nf
Groundwater 25 people served
0 violations
Usfs Sierra Nf
Surface water 25 people served
0 violations
Fresno County Water Works
Groundwater 25 people served
0 violations
Usfs Sierra Nf
Groundwater 25 people served
0 violations
Usfs Sierra Nf
Groundwater 25 people served
0 violations
Usfs Sierra Nf
Groundwater 25 people served
0 violations
Usfs Sierra Nf
Groundwater 25 people served
0 violations
Usfs Sierra Nf
Groundwater 25 people served
0 violations
Fcsa 31 - Shaver Lake Comm. Center
Groundwater 25 people served
0 violations
Usfs Sierra Nf
Groundwater 25 people served
0 violations
Usfs Sierra Nf
Groundwater 25 people served
0 violations
Usfs Sierra Nf
Groundwater 25 people served
0 violations
Usfs Sierra Nf
Surface water 25 people served
0 violations
Usfs Sierra Nf
Surface water 25 people served
0 violations
Usfs Sierra Nf
Groundwater 25 people served
0 violations
Usfs Sierra Nf
Groundwater 25 people served
0 violations
Usfs Sierra Nf
Groundwater 25 people served
0 violations
Usfs Sierra Nf
Groundwater 25 people served
0 violations
Usfs Sierra Nf
Surface water 0
0 violations
Usfs Sierra Nf
Groundwater 0
0 violations
@Fcsa #40/Del Rio
Purchased groundwater 0
0 violations
Usfs Sierra Nf
Groundwater 0
0 violations
Usfs Sierra Nf
Groundwater 0
0 violations
Usfs Sierra Nf
Groundwater 0
0 violations
Contaminants Found
Total Haloacetic Acids (HAA5)Health-Based
12 violations
All resolved
TTHMHealth-Based
12 violations
All resolved
NitrateHealth-Based
At high levels, nitrate can cause blue baby syndrome in infants.
4 violations
All resolved
Revised Total Coliform RuleMonitoring
Missed testing deadlines — not a detection of bacteria.
3 violations
All resolved
Lead & Copper Levels
Lead (Pb)
Approaching limit8 ppb measured
Action level: 15 ppb
Sampled: Jan 2025
Copper (Cu)
Exceeds limit5100 ppb measured
Action level: 1300 ppb
Sampled: Jan 2025
How Does This Compare?
Fresno (93721) has more violations than 85% of US ZIP codes. The national average is 18.87 violations per ZIP over 5 years. This ZIP has 31.
Fewer violations 85th 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
One of the few filtration methods effective at removing nitrates and nitrites. Essential for households with infants.
Targets:Nitrate, Nitrite, Dissolved Solids
Look for:NSF/ANSI 58 certified
Activated Carbon Filter
Excellent for removing chlorine, chloramine, and disinfection byproducts like THMs and HAAs. Available as pitcher filters, countertop, or under-sink units.
Targets:THMs, HAAs, Chlorine, Chloramine, Taste & Odor
Look for:NSF/ANSI 42 & 53 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.