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WaterSafeCheck
Official EPA SDWIS Verified ReportWater Quality & Testing GuideStatus: Normal Operations

ZIP Code 30031 Water Quality & Testing Report

Decatur, GA · Dekalb County County · Updated for 2026

Quick EPA Verified Answer

Is Tap Water Safe to Drink in ZIP 30031 (Decatur, GA)?

Yes, tap water in ZIP code 30031 (Decatur, GA) is safe to drink under EPA Safe Drinking Water Act standards. Supplied by Dekalb County, the area earns an EPA Safety Grade of A (86/100) with 0 health violations, 5.5 ppb lead, and soft (49 mg/L / 2.9 GPG) water.

Safety Score
A

Water Safety Grade

Excellent — Meets all EPA standards

Health Violations

0

Total Violations

1

Lead Risk

N/A

Contaminants

0

About Tap Water in ZIP Code 30031

Tap water in ZIP code 30031 (Decatur, GA) is distributed by Dekalb County (EPA ID: GA0890001), serving approximately 743,000 residents. Based on EPA Safe Drinking Water Act compliance records, this system receives a water safety grade of A with a composite quality score of 86/100.

Water System

Dekalb County

EPA ID: GA0890001

Water Source

Surface Water

Population Served

743,000 residents

County

Dekalb County County, Georgia

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Lead Levels in ZIP 30031

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

Lead Level: 5.5 ppb — Moderate

The 90th percentile lead level in 30031 is 5.5 ppb. This is below the EPA action level of 15 ppb, but above ideal health goals. Consider a certified lead-reducing filter.
Lead Level (90th percentile)
5.50 ppb (0.0055 mg/L)
Lead (Consumer Confidence Report)

From annual CCR filing

22.3 ppb
Copper (Consumer Confidence Report)

From annual CCR filing

1.4 ppb
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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Water Hardness & Mineral Content

Grains per gallon (GPG) & Parts per million (PPM / mg/L)

Classification: Soft2.9 GPG · 49 mg/L

Water in ZIP 30031 is classified as Soft (49 mg/L / 2.9 GPG). Soft water produces abundant soap lather, prevents scale buildup in water heaters, and does not leave spots on dishes.

Recommendation: No water softener is needed. Standard carbon filtration is sufficient for taste and chlorine reduction.
Hardness (GPG)

Grains per gallon

2.9 GPG
Hardness (PPM / mg/L)

Parts per million CaCO3

49 mg/L
Appliance Scaling Risk
Very Low

Official EPA SDWIS Database Entry

Utility: Dekalb County · PWSID: GA0890001

Verify on EPA.gov
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Violation History

Past 5 years — EPA SDWIS data

Dekalb County has recorded 1 violation, but none are health-based (e.g., administrative or monitoring infractions).

Total Violations (5 yr)
1
Health-Based Violations
0
Unresolved Violations
0
Boil Water Advisories
0
Compliance Risk
Low

Regulatory compliance risk for this utility is rated Low based on past reporting and enforcement records.

⚗️

Contaminants Detected

Contaminants with health-based violations on record

No health-based contaminant violations are on record for ZIP code 30031 under the Safe Drinking Water Act.

From Consumer Confidence Report:

Lead (90th percentile) (22.3 ppb*); Copper (90th percentile) (1.36 ppm*)

⚖ Enforcement Actions

EPA or state regulators have issued 2 enforcement actions to address compliance lapses.
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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
CCR Source Classification
Chattahoochee River (surface water)

Water Quality Testing in ZIP 30031

Tap Water & Well Testing Recommendations

Residents in ZIP code 30031 served by Dekalb County can test tap water or private well systems to verify water purity. Testing detects hidden contaminants before they impact family health.

Tap Water Testing Steps

  • 1.Conduct a certified lead check if your home was constructed before 1986.
  • 2.Use certified lab testing kits rather than uncalibrated test strips for regulated compliance.
  • 3.Sample water from both your kitchen faucet and water heater to compare line purity.

Private Well Testing Steps

  • •Test for Coliform bacteria and Nitrates annually.
  • •Test for heavy metals, radon, and PFAS every 3 years.
  • •Send samples to a state-certified drinking water laboratory recognized by Georgia Environmental Protection Division.
Certified Lab Testing: Always use an EPA-certified drinking water laboratory in GA for formal legal or real estate compliance testing.

🛡 What Should You Do? — ZIP 30031 Recommendations

  • ✓ Run cold water for 30 seconds each morning before use — especially if pipes are old
  • ✓ Request your annual Consumer Confidence Report from Dekalb County
  • ✓ If your home was built before 1986, consider testing your own tap for lead
  • ✓ Use a pitcher filter (NSF/ANSI 42 certified) for improved taste

Recommended Taste & Safety Filter:

🚰

NSF/ANSI 53 Certified Pitcher Filter

Best for removing aesthetic chlorine, odors, and low-level heavy metals.

Filter Selection Guide →

Frequently Asked Questions — ZIP 30031 Water Quality

Is tap water safe to drink in ZIP code 30031?+
Yes — tap water in 30031 (Decatur, GA) meets EPA standards with a water safety grade of A. No health-based violations are on record in the past 5 years.
How do I get my water tested in ZIP 30031 (Decatur, GA)?+
To test water quality in ZIP 30031, you can order a certified drinking water test kit or send water samples to an EPA/NELAP certified laboratory in GA. Certified testing checks for lead, coliform bacteria, nitrates, hardness, and PFAS that standard test strips miss. Contact Georgia Environmental Protection Division for a list of certified regional labs.
How hard is the tap water in 30031?+
Tap water in 30031 is classified as Soft with an estimated mineral hardness of 49 mg/L (2.9 GPG). No water softener is needed. Standard carbon filtration is sufficient for taste and chlorine reduction.
Should I test private well water in 30031?+
Yes. Unlike municipal systems, private wells in 30031 are not regulated by the EPA or local utilities. Private well owners should test their water annually for coliform bacteria and nitrates, and every 3 to 5 years for heavy metals (lead, arsenic) and volatile organic compounds.
What is the lead level in 30031 tap water?+
The 90th percentile lead level in 30031 is 5.5 ppb. The EPA action level is 15 ppb. This is below the EPA action level.
Is there an active boil water notice in 30031?+
There are currently no active boil water advisories on record for 30031. Water treatment systems are operating within normal parameters.
Who provides tap water to 30031?+
Tap water in ZIP code 30031 is provided by Dekalb County (EPA ID: GA0890001), serving approximately 743,000 residents.
What water filter should I use in 30031?+
Based on water metrics for 30031, we recommend Lead & Microplastic Filter. Look for certifications such as NSF/ANSI 53 (Lead Reduction), NSF/ANSI 42 (Particulate/Taste).

Data Sources & Methodology

Water quality data for ZIP code 30031 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 Dekalb County. 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 →