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WaterSafeCheck

ZIP Code 93483 Water Quality Report

Grover Beach, CA · San Luis Obispo County County

Safety Score
D

Water Safety Grade

Poor — Multiple violations recorded

Health Violations

19

Total Violations

22

Lead Risk

N/A

Contaminants

1

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Active Water Quality Issues Detected

EPA records show 10 unresolved violations. Contact City of Grover Beach Public Works Department for current status.

About Tap Water in ZIP Code 93483

Tap water in ZIP code 93483 (Grover Beach, CA) has received a D grade (score: 50/100) — below average for the nation. City of Grover Beach Public Works Department 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

City of Grover Beach Public Works Department

EPA ID: CA4010004

Water Source

Surface Water

Population Served

12,701 residents

County

San Luis Obispo County County, California

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Lead Levels in ZIP 93483

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

Lead Level: 0.6 ppb — Very Low

The 90th percentile lead level in 93483 is 0.6 ppb, well below the EPA action level of 15 ppb. While this is a reassuring result, the EPA's public health goal for lead is actually zero — no amount of lead is considered completely safe, particularly for children under 6 and pregnant women. Running your tap for 30 seconds before use and using a certified NSF/ANSI 53 filter adds an extra layer of protection.
Lead Level (90th percentile)
0.60 ppb (0.0006 mg/L)
Lead Exposure Risk Rating
Unknown
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

City of Grover Beach Public Works Department 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. 10 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)
22
Health-Based Violations
19
Unresolved Violations
10
Boil Water Advisories
0
Compliance Risk
Critical

Regulatory compliance risk is rated Critical — the highest risk category. City of Grover Beach Public Works Department 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 1 contaminant associated with health-based violations in ZIP code 93483: Barium. 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.

Barium

⚖ Enforcement Actions

8 enforcement actions have been issued against City of Grover Beach Public Works Department — a high number that reflects sustained compliance struggles. Enforcement actions escalate from administrative orders to financial penalties when utilities repeatedly fail to meet safe drinking water standards.
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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

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

🛡 What Should You Do? — ZIP 93483 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 City of Grover Beach Public Works Department 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 93483 Water Quality

Is tap water safe to drink in ZIP code 93483?+
Tap water in 93483 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 93483 tap water?+
The 90th percentile lead level in 93483 is 0.6 ppb (parts per billion). The EPA action level is 15 ppb. This is a low level, well below the EPA action level of 15 ppb.
Who provides tap water to 93483?+
Tap water in ZIP code 93483 is provided by City of Grover Beach Public Works Department (EPA ID: CA4010004). This system serves approximately 12,701 residents. You can contact them directly for Consumer Confidence Reports, current advisories, and billing information.
What is the water source for 93483?+
ZIP code 93483 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 93483 have any active water quality violations?+
Yes — there are currently 10 unresolved violations on record for this water system. Unresolved violations indicate issues that have not yet been formally corrected in EPA tracking systems. Contact City of Grover Beach Public Works Department for the latest update.
How do I get a copy of my water quality report for 93483?+
Your water utility — City of Grover Beach Public Works Department — 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 "City of Grover Beach Public Works Department Consumer Confidence Report." The EPA's ECHO database also has historical compliance data.
What water filter should I use in 93483?+
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 93483, with detected contaminants including Barium, a multi-stage filter or reverse osmosis system is recommended.
Is 93483 tap water safe for babies and infants?+
Infants are especially vulnerable to lead, nitrates, and microbial contaminants in drinking water. Current EPA data for 93483 shows a lead level of 0.6 ppb — below the action level, but as an extra precaution, run your tap for 30 seconds before use and consider a certified lead filter for infant formula. Always consult your pediatrician for guidance specific to your child's health.

Data Sources & Methodology

Water quality data for ZIP code 93483 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 City of Grover Beach Public Works Department. 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 →