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WaterSafeCheck

Signal Hill, CA Tap Water Quality

Water safety reports for all 1 ZIP code in Signal Hill, California

Average Score

78/100

Health Violations

5

ZIP Codes

1

High Lead Risk

1

of 1 ZIP codes

B

About Tap Water in Signal Hill, CA

The drinking water in Signal Hill, CA generally meets all federal health standards, earning a solid B grade with a composite safety score of 78/100 across 1 ZIP code. While the primary water utility, Signal Hill - City, Water Department, maintains adequate compliance with EPA regulations, there have been minor or administrative violations on record. Overall, residents receive safe tap water that is actively monitored by California State Water Resources Control Board.

The accumulation of 5 health-based violations over the past 5 years highlights systemic challenges within Signal Hill's water infrastructure. When violations occur, it means that drinking water tests revealed contaminant levels exceeding safe limits, triggering mandatory corrective actions by California State Water Resources Control Board. The city relies on surface water, which may require significant treatment upgrades to address these recurring issues.

Additionally, lead exposure risk remains a critical issue for certain neighborhoods. EPA data indicates that 1 out of 1 ZIP codes in Signal Hill are rated as High or Very High risk for lead. This risk is often driven by aging homes with pre-1986 plumbing containing lead solder or service lines. Families in these areas should test their tap water and consider NSF/ANSI 53 certified filters.

⚠ Lead Risk Alert: Some ZIP codes in Signal Hill are rated High or Very High for lead exposure risk based on EPA data. Search your specific ZIP code for a detailed lead level report.

Health-Based Contaminant Violations in Signal Hill

EPA records indicate that the following contaminants have exceeded Safe Drinking Water Act Maximum Contaminant Levels (MCLs) in Signal Hill water systems over the past 5 years.

E. coli

Note: The presence of a past violation does not necessarily mean current water is unsafe. Utilities are required to take corrective action. Review your Consumer Confidence Report for the latest status.

Water Quality by ZIP Code — Signal Hill, CA

Click any ZIP code for the full water quality report

B
90755

Signal Hill, CA

Score: 78/1005 violations

Frequently Asked Questions — Signal Hill Water Quality

Is tap water safe to drink in Signal Hill, CA?+
Yes — tap water in Signal Hill meets all federal EPA standards and earns a B grade. It is generally safe for healthy adults. As always, running your tap for 30 seconds before use and using a filter adds extra protection for vulnerable populations.
What is the water quality score for Signal Hill?+
The average water quality score across 1 ZIP code in Signal Hill, CA is 78/100. Scores are derived from EPA violation history, lead levels, enforcement actions, and infrastructure risk indicators. Individual ZIP codes may vary — search your specific ZIP above for a personalized report.
Does Signal Hill have lead in its tap water?+
1 out of 1 ZIP codes in Signal Hill are rated High or Very High for lead exposure risk. Older homes built before 1986 may have lead service lines or plumbing fixtures. Residents should run their tap for 30 seconds before use and consider a certified NSF/ANSI 53 lead filter.
How do I get the water quality report for Signal Hill?+
Each ZIP code in Signal Hill has a full water quality report on this site — click any ZIP code below. You can also get the annual Consumer Confidence Report (CCR) from your local water utility. The CCR is required to be published every year by July 1 and contains actual contaminant measurements and violation history.
Where does Signal Hill's tap water come from?+
Tap water in Signal Hill, CA primarily comes from surface water. Surface water systems treat water from rivers, lakes, or reservoirs using filtration, sedimentation, and disinfection before it reaches your tap.

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