Water Quality in Oxnard, CA (93021)

EPA violation data for public water systems serving ZIP code 93021.

No Health-Based Violations

None of the 13 water systems serving this ZIP have exceeded federal contaminant limits in the past 5 years. There are3 monitoring/reporting violations (missed testing deadlines), all resolved.

Better than 43% of US ZIP codes.

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

37,746

Population

13

Water Systems

3

Violations (5yr)

0

Health-Based

Location

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Water Systems Serving This Area (13)

Oxnard Water Dept

Purchased surface water 200,232 people served
0 violations
Lead tested: 2.2 ppb (limit: 15 ppb)

Ventura Water Department

Surface water 113,500 people served
0 violations

Ventura Wwd No. 8 - Simi Valley

All resolved
Purchased surface water 94,738 people served
1 violation (5yr) · All resolved
Lead tested: 0 ppb (limit: 15 ppb)

Cal American Water Co

All resolved
Purchased surface water 66,809 people served
1 violation (5yr) · All resolved
Lead tested: 3 ppb (limit: 15 ppb)

City Of Thousand Oaks Water Department

Purchased surface water 53,157 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb)

Camarillo Water Dept

Purchased surface water 46,824 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb)

Golden State Water Company - Simi Valley

Purchased surface water 45,128 people served
0 violations

Ventura Cwwd No. 1 - Moorpark

Purchased surface water 35,514 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb)

Ventura Cwwd No. 17 - Bell Canyon

Purchased surface water 1,946 people served
0 violations
Lead tested: 8 ppb (limit: 15 ppb)

Ventura Cwwd No. 38 - Lake Sherwood

Purchased surface water 1,759 people served
0 violations
Lead tested: 7 ppb (limit: 15 ppb)

Ventura Cwwd No. 19 - Somis

All resolved
Purchased surface water 1,429 people served
1 violation (5yr) · All resolved

Thermic Mutual Water Co

Purchased groundwater 38 people served
0 violations

Waters Road Domestic Users Group

Purchased surface water 25 people served
0 violations
Lead tested: 0 ppb (limit: 15 ppb)

Contaminants Found

Revised Total Coliform RuleMonitoring

Missed testing deadlines — not a detection of bacteria.

2 violations
All resolved
NitrateMonitoring

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

1 violation
All resolved

Lead & Copper Levels

Lead (Pb)

Within limit
0 ppb measured Action level: 15 ppb

Sampled: Jul 2023

How Does This Compare?

Oxnard (93021) has more violations than 43% of US ZIP codes. The national average is 18.87 violations per ZIP over 5 years. This ZIP has 3, most of which are monitoring/reporting issues.

Fewer violations 43th percentile More violations

Water Filter Recommendations

No contaminant issues detected. For general protection, a basic carbon filter removes common impurities like chlorine and sediment. Look for NSF/ANSI 42 certified products.

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