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WaterSafeCheck

Ada, OK Tap Water Quality

Water safety reports for all 2 ZIP codes in Ada, Oklahoma

Average Score

94/100

Health Violations

2

ZIP Codes

2

High Lead Risk

0

of 2 ZIP codes

A

About Tap Water in Ada, OK

Tap water in Ada, OK ranks among the best in the state, maintaining a remarkable average water quality score of 94/100 across its 2 ZIP codes. Based on recent EPA Safe Drinking Water Act compliance records, water provided by ADA and other municipal suppliers has consistently met or exceeded federal safety standards. This top-tier "A" grade reflects strong infrastructure, diligent monitoring by Oklahoma Department of Environmental Quality, and low contaminant levels.

Over the past 5 years, Ada has recorded 2 health-based violations. While occasional violations can occur due to seasonal changes or temporary infrastructure issues, ADA is legally required to resolve these quickly and notify the public via their annual Consumer Confidence Report. The city's water supply, primarily drawn from ground water, is treated to address these specific contaminants.

Fortunately, the modeled risk for widespread lead exposure in Ada's municipal water is relatively low compared to national averages. However, because lead typically enters drinking water through the corrosion of older, individual home plumbing rather than the main supply lines, residents in homes built before 1986 should still exercise caution by running the tap before use.

Health-Based Contaminant Violations in Ada

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

Stage 2 DBP Rule

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 — Ada, OK

Click any ZIP code for the full water quality report

A
74821

Ada, OK

Score: 98/1001 violation
A
74820

Ada, OK

Score: 89/1001 violation

Frequently Asked Questions — Ada Water Quality

Is tap water safe to drink in Ada, OK?+
Yes — tap water in Ada meets all federal EPA standards and earns a A 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 Ada?+
The average water quality score across 2 ZIP codes in Ada, OK is 94/100. 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 Ada have lead in its tap water?+
Lead risk ratings in Ada are relatively low based on EPA monitoring data. However, lead in home plumbing is a separate concern — if your home was built before 1986, individual tap testing is recommended.
How do I get the water quality report for Ada?+
Each ZIP code in Ada 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 Ada's tap water come from?+
Tap water in Ada, OK primarily comes from ground water. Groundwater systems pump water from underground aquifers, which is naturally filtered through soil and rock but can still contain naturally occurring contaminants.

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