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WaterSafeCheck

ZIP Code 91355 Water Quality Report

Valencia, CA · Los Angeles County County

Safety Score
D

Water Safety Grade

Poor — Multiple violations recorded

Health Violations

19

Total Violations

21

Lead Risk

High

Contaminants

2

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Active Water Quality Issues Detected

EPA records show 20 unresolved violations. Contact Santa Clarita Valley Water Agency for current status.

About Tap Water in ZIP Code 91355

Tap water in ZIP code 91355 (Valencia, CA) has received a D grade (score: 47/100) — below average for the nation. Santa Clarita Valley Water Agency has recorded notable violations with EPA Safe Drinking Water Act regulations. Residents may want to consider additional filtration and review their annual Consumer Confidence Report.

Water System

Santa Clarita Valley Water Agency

EPA ID: CA1910240

Water Source

Surface Water

Population Served

294,090 residents

County

Los Angeles County County, California

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Lead Levels in ZIP 91355

EPA action level: 15 ppb | Public health goal: 0 ppb

Lead Level: 9.6 ppb — Below Action Level

The 90th percentile lead level in 91355 is 9.6 ppb, below the EPA action level of 15 ppb but above what many health experts consider ideal. The CDC and EPA both affirm there is no safe level of lead exposure for children. Families with young children or pregnant women should consider a certified NSF/ANSI 53 water filter, and request lead testing of their home's tap water.

Lead exposure risk in 91355 is rated High. EPA models estimate a 52% probability of lead exposure risk in this ZIP code based on housing age, infrastructure age, and water system data. This typically reflects older housing stock built before 1986 (when lead pipes were banned), aging distribution infrastructure, or detected lead levels in water samples. Families should prioritize getting their tap water tested independently and installing a certified lead-reducing filter.

Lead Level (90th percentile)
9.60 ppb (0.0096 mg/L)
Lead Exposure Risk Rating
High
Lead Exposure Probability

EPA model estimate based on housing age and infrastructure

52%
Note: Lead levels above are the 90th percentile from EPA monitoring — meaning 90% of samples were at or below this level. Even "undetected" tap water lead doesn't account for lead leaching from home plumbing. If your home was built before 1986, individual tap testing is recommended.
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Violation History

Past 5 years — EPA SDWIS data

Santa Clarita Valley Water Agency has recorded 19 health-based violations in the past 5 years — significantly above the national average. This volume of violations indicates serious and recurring compliance issues. Independent water testing and in-home filtration are strongly recommended. 20 violations are currently unresolved — meaning the issue has not yet been formally corrected in EPA records. This is a serious concern that residents should follow up on with their water utility.

Total Violations (5 yr)
21
Health-Based Violations
19
Unresolved Violations
20
Boil Water Advisories
0
Compliance Risk
Critical

Regulatory compliance risk is rated Critical — the highest risk category. Santa Clarita Valley Water Agency has an extensive history of unresolved violations and enforcement actions. Independent water testing is highly recommended.

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Contaminants Detected

Contaminants with health-based violations on record

EPA records identify 2 contaminants associated with health-based violations in ZIP code 91355: Barium, Stage 2 DBP Rule. These contaminants exceeded the Maximum Contaminant Levels (MCLs) established by the EPA under the Safe Drinking Water Act at some point in the 5-year monitoring period. The presence of these violations does not necessarily mean water is currently unsafe — water systems are often required to increase monitoring and treatment when violations occur. Review the annual Consumer Confidence Report for the most current status.

BariumStage 2 DBP Rule

⚖ Enforcement Actions

EPA or state regulators have issued 2 enforcement actions against Santa Clarita Valley Water Agency. Enforcement actions are formal compliance orders or penalties issued when a utility fails to address violations within required timeframes.
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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.

Water Source Type
Surface Water
EPA Radon Zone

Moderate potential

Zone 2
Annual Flood Risk Cost

Estimated annual flood-related costs per property

$0
Energy Burden

% of household income spent on energy — indicator of older infrastructure

3.33%

EPA Radon Zone 2 — moderate radon potential. The EPA recommends testing your home regardless of zone designation.

🛡 What Should You Do? — ZIP 91355 Recommendations

  • 🚨 Install a certified NSF/ANSI 53 or 58 (reverse osmosis) filter immediately for drinking and cooking
  • 🚨 Do not give unfiltered water to children, pregnant women, or immunocompromised individuals
  • 🚨 Contact Santa Clarita Valley Water Agency to request the current violation status and corrective action plan
  • 🚨 Report concerns to your state environmental agency or call the EPA hotline: 1-800-426-4791
  • 🚨 Consider having your home's tap water independently tested by a certified lab

Frequently Asked Questions — ZIP 91355 Water Quality

Is tap water safe to drink in ZIP code 91355?+
Tap water in 91355 has a below-average water quality grade of D. While it is treated, there have been notable compliance issues. We strongly recommend using a certified NSF/ANSI 53 water filter for drinking and cooking, especially for vulnerable populations.
What is the lead level in 91355 tap water?+
The 90th percentile lead level in 91355 is 9.6 ppb (parts per billion). The EPA action level is 15 ppb. This is below the action level, but some health experts recommend a lead filter for families with young children.
Who provides tap water to 91355?+
Tap water in ZIP code 91355 is provided by Santa Clarita Valley Water Agency (EPA ID: CA1910240). This system serves approximately 294,090 residents. You can contact them directly for Consumer Confidence Reports, current advisories, and billing information.
What is the water source for 91355?+
ZIP code 91355 is served by surface water. Surface water systems draw from rivers, lakes, or reservoirs and must meet strict EPA treatment requirements including filtration and disinfection.
Does 91355 have any active water quality violations?+
Yes — there are currently 20 unresolved violations on record for this water system. Unresolved violations indicate issues that have not yet been formally corrected in EPA tracking systems. Contact Santa Clarita Valley Water Agency for the latest update.
How do I get a copy of my water quality report for 91355?+
Your water utility — Santa Clarita Valley Water Agency — is required by law to send you an annual Consumer Confidence Report (CCR) by July 1 each year. You can also request it directly from the utility or find it online by searching "Santa Clarita Valley Water Agency Consumer Confidence Report." The EPA's ECHO database also has historical compliance data.
What water filter should I use in 91355?+
The right filter depends on what contaminants are present. For lead, look for a filter certified to NSF/ANSI Standard 53. For chlorine byproducts (like THMs), NSF/ANSI 42 filters work well. For a broad range of contaminants including PFAS, look for NSF/ANSI 58 (reverse osmosis) systems. For ZIP code 91355, with detected contaminants including Barium and Stage 2 DBP Rule, a multi-stage filter or reverse osmosis system is recommended.
Is 91355 tap water safe for babies and infants?+
Infants are especially vulnerable to lead, nitrates, and microbial contaminants in drinking water. Given the detected lead level of 9.6 ppb in 91355, we recommend using a certified NSF/ANSI 53 water filter or certified bottled water for preparing infant formula. Always consult your pediatrician for guidance specific to your child's health.

Data Sources & Methodology

Water quality data for ZIP code 91355 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 Santa Clarita Valley Water Agency. 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 →