Drinking water tracked for Oklahoma City by OK authorities posts above-average scores - the majority of systems are free from health-based exceedances and the city's grade sits above the state median.

Data: EPA SDWIS, FEMA NFIP, Census ACS

Water Quality in Oklahoma City

We track home safety signals for 79 ZIP codes in Oklahoma City, Oklahoma. EPA community-water data is directly mapped for 42 ZIP codes and 19 water systems.

31 of 42 directly mapped ZIP records with reported violation counts (74%) have recorded EPA violations - 1,729 total, including 58 health-based violations.

Average Home Safety Score: B (84/100)

Water sources: Groundwater, Surface water.

Top Contaminants

Lead Risk

• Average lead level (90th percentile): 0.0018 mg/L
• 2 of 42 ZIP codes with known status exceed the EPA lead action level
• 61% of housing built before 1986 (when lead solder was banned)
• 15% of housing built before 1950 (when lead pipes were standard)
• Median year built: 1975
• Most common estimated pipe material: Galvanized Steel or Copper
• Lead exposure risk score: 47/100
• Estimated lead service line probability: 17%
• 26 ZIP codes classified as high or very high lead risk

With 61% of homes built before the 1986 lead solder ban, Oklahoma City residents - especially those in older neighborhoods - should consider testing their tap water for lead. Homes built before 1950 are at the highest risk of having lead service lines.

Housing Age Distribution

313,014 total housing units across 79 ZIP codes:

Flood Risk

FEMA National Flood Insurance Program data for Oklahoma City:

• 1,611 flood insurance claims on record
• $21,870,908 sum of reported building, contents, and ICC payment components
• 1,140 claims with payment data
• 471 claims without reported payment fields
• $19,185 average reported component sum among claims with payment data
• Dominant rated-zone value in historical claims: D (other)
• 16 of 46 ZIP codes with claim-zone records have an A/V-family dominant rated zone in those claims
• Claim-zone values are historical insurance records, not a complete current FEMA property-map inventory

Radon Risk

Dominant EPA radon zone among 79 ZIP records with zone data: Zone 3 (Low Risk)

• Zone 1 (High): 0 ZIP codes
• Zone 2 (Moderate): 0 ZIP codes
• Zone 3 (Low): 79 ZIP codes

Neighborhoods by Safety Score

Safest Areas

Areas Needing Attention

What Oklahoma City Residents Can Do

Test Your Water

• Order a certified lab test - home test kits cost $20–50 and cover lead, bacteria, and common contaminants
• Request your utility's CCR (Consumer Confidence Report) - your water provider must publish this annually
• Check your ZIP code - each area in Oklahoma City has different water systems and risk levels

Filter Your Water

• NSF-certified pitcher filter removes chlorine taste and some contaminants ($20–40)
• NSF 53-certified filter for lead - recommended for homes built before 1986
• Reverse osmosis system removes 95%+ of contaminants including lead, PFAS, and nitrates ($150–400)

Stay Informed

• Visit your ZIP code report for detailed, address-level data
• Sign up for EPA water quality alerts
• Review the annual water quality report from your local utility

All ZIP Codes in Oklahoma City

• 73101
• 73102 [A]
• 73103 [A]
• 73104 [A]
• 73105 [B] - 69 violations ⚠
• 73106 [A]
• 73107 [A]
• 73108 [A]
• 73109 [A]
• 73110 [B] - 212 violations ⚠
• 73111 [B] - 69 violations ⚠
• 73112 [B] - 69 violations ⚠
• 73113
• 73114 [B] - 69 violations ⚠
• 73115 [B] - 48 violations ⚠
• 73116 [B] - 69 violations ⚠
• 73117 [A] - 11 violations ⚠
• 73118 [B] - 69 violations ⚠
• 73119 [A]
• 73120 [B] - 77 violations ⚠
• 73121 [A]
• 73122 [A] - 7 violations ⚠
• 73123
• 73124
• 73125
• 73126
• 73127 [B] - 32 violations ⚠
• 73128 [A]
• 73129 [A] - 2 violations ⚠
• 73130 [B] - 182 violations ⚠
• 73131 [B] - 69 violations ⚠
• 73132 [A] - 7 violations ⚠
• 73134 [A] - 8 violations
• 73135 [A] - 41 violations ⚠
• 73136
• 73137
• 73139 [B] - 73 violations ⚠
• 73140
• 73141 [B] - 182 violations ⚠
• 73142 [A] - 8 violations
• 73143
• 73144
• 73145 [A] - 39 violations
• 73146
• 73147
• 73148
• 73149 [B] - 59 violations ⚠
• 73150
• 73151 [A]
• 73152
• 73153
• 73154
• 73155
• 73156
• 73157
• 73159 [B] - 14 violations ⚠
• 73160 [B] - 62 violations ⚠
• 73162 [A] - 8 violations
• 73163
• 73164
• 73165 [A] - 59 violations ⚠
• 73167
• 73169 [B] - 14 violations ⚠
• 73170 [B] - 73 violations ⚠
• 73172
• 73173 [A] - 14 violations ⚠
• 73178
• 73179 [B] - 14 violations ⚠
• 73184
• 73185
• 73189
• 73190
• 73193
• 73194
• 73195
• 73196
• 73197
• 73198
• 73199

Frequently Asked Questions

Is the tap water safe to drink in Oklahoma City, OK?

The Home Safety Score is not a drinking-water grade. Oklahoma City has an average score of 84/100 (grade B) across 42 ZIP codes with complete current-model evidence. Separately, there are 1729 recorded EPA violations across 42 directly mapped ZIP records with reported counts, 58 of which are health-based. Check the specific ZIP and serving utility before drawing a water-safety conclusion.

Does Oklahoma City have lead in the water?

The average 90th-percentile lead level across Oklahoma City is 0.0018 mg/L, below the EPA action level of 0.015 mg/L. 2 of 42 ZIP codes with known action-level status exceed the EPA limit. About 61% of housing was built before 1986, when lead solder was banned.

Is Oklahoma City at risk for flooding?

FEMA data shows 1,611 flood insurance claim records in Oklahoma City ZIP codes, with an average reported building, contents, and ICC component sum of $19,185 among 1,140 claims with payment data. 471 claims lack reported payment fields and are not counted as zero. Among 46 ZIP codes with historical claim-zone values, 16 have an A/V-family dominant rated zone in those claims. Claim records do not establish current property-level flood risk; check the FEMA map for a specific address.

Are there lead pipes in Oklahoma City homes?

61% of Oklahoma City housing was built before 1986, when lead solder was common in plumbing. 15% was built before 1950, when lead pipes were standard. The most common estimated pipe material is Galvanized Steel or Copper. The estimated probability of lead service lines is 17%. We recommend testing your water if your home was built before 1986.

What contaminants have been found in Oklahoma City water?

The most common contaminants by violation count are Stage 2 DBP Rule, Barium, Contaminant 2005. Across 42 ZIP codes with directly mapped EPA water data, 31 have recorded EPA violations. Check your ZIP code report for the specific contaminants in your area.

Data Sources

• Water quality: EPA Safe Drinking Water Information System (SDWIS)
• Lead/copper: EPA Lead and Copper Rule sampling data
• Housing age: U.S. Census Bureau American Community Survey
• Flood data: FEMA National Flood Insurance Program
• Lead exposure: Composite risk score based on housing age, water lead levels, and service line estimates
• Radon: EPA Map of Radon Zones

Source reporting periods vary. See each cited source for its publication schedule.

Housing Age Profile

Copper plumbing joined with lead solder was standard practice through the mid-1980s - a design choice that federal regulators prohibited in 1986. Oklahoma City's residential inventory, centered around a median build year of 1975, is weighted toward the post-prohibition era. That context is relevant because the primary plumbing risk in older homes comes not from the municipal water supply but from what happens as water moves through lead-jointed pipes inside the structure - an exposure pathway that newer homes mostly avoid.

1975

Median Year Built

0%

Pre-1986 (Lead Paint Risk)

0%

Pre-1970 (Lead Pipes Risk)

Most homes in Oklahoma City were built after 1986, reducing the risk of lead contamination from plumbing. Older homes should still be tested.

Source: U.S. Census Bureau ACS B25034.

Oklahoma City: Lead Risk & Vulnerable Populations

2 of 79

ZIPs Over EPA Lead Limit

0.0018

mg/L Avg Lead (Limit: 0.015)

Why children are most at risk: The CDC states there is no safe level of lead exposure for children. Children under 6 absorb lead more readily than adults, and even low levels can cause developmental delays, learning difficulties, and behavioral problems.

Lead risk in Oklahoma City appears low overall, but individual homes may differ. Testing is the only way to confirm your water's lead content.

<strong>2 ZIP codes</strong> (3% of the city) exceed the EPA lead action level of 0.015 mg/L.

Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.

Oklahoma City: NFIP Claim Records and Water-Quality Context

1,611

Total FEMA Flood Claims

$19,185

Avg Reported Sum With Payment Data

35%

A/V Share of Claim-Record ZIPs

Historical NFIP data for Oklahoma City contains 1,611 flood insurance claims. Among claims with payment data, the average reported building, contents, and ICC component sum is $19,185. Among ZIP codes with claim records, 35% have an A- or V-family dominant rated zone recorded in those historical claims. This is not a complete current FEMA property-map inventory.

How flooding affects water quality: Flood events can introduce sewage, agricultural runoff, and industrial chemicals into water supplies. Even after floodwaters recede, contamination can persist in wells and aging infrastructure.

Claim count does not establish current property risk. Check the exact address in FEMA's current map and obtain a property-specific insurance quote when relevant.

Source: historical FEMA National Flood Insurance Program (NFIP) claim records. No current FEMA property-map designation is asserted.