Bison, OK Water Safety: 99/100 (2026)
1 ZIP code · 1 water system · Updated 2026-06-03
Bison tap water earns a high safety grade — above-average compliance with OK and federal standards.
How Bison Compares
Data: EPA SDWIS Last verified: 2026-06-03
Bison Water: The Quick Version
- Average lead level: 0.002 mg/L.
- Homes built before 1986: 65% — older plumbing may contain lead solder.
- CDC health risk index: 14.34 — above typical levels.
Water Systems Serving Bison
Because residential water in Bison, OK flows primarily through a single utility, infrastructure decisions, rate-setting, and EPA compliance are all managed within one organizational structure. Federal records show 1 system active in the area, but one provider dominates the service landscape for most homes and apartments.
Overview
We track water quality and home safety data for 1 ZIP code in Bison, Oklahoma (population ~218), covering 1 community water system serving approximately 1,980 people region-wide.
No EPA violations recorded across any ZIP codes in Bison — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Bison: A (99/100)
The score combines three factors:
| Factor | What It Measures |
|---|---|
| Water Quality | EPA violations and compliance history |
| Lead Levels | 90th percentile lead concentration vs EPA action level |
| Radon Risk | EPA radon zone classification |
Water Sources
Bison water systems draw from: Groundwater.
Lead & Copper
- Average lead level (90th percentile): 0.0020 mg/L (EPA action level: 0.015 mg/L)
- 0 ZIP codes exceed the EPA lead action level
Radon Risk
Dominant radon zone: Zone 3 (Low Risk)
Areas with No Violations
| ZIP Code | Safety Score | System | Population |
|---|---|---|---|
| 73720 | A | Garfield Company Rwd #5 | 1,980 |
All ZIP Codes in Bison
- 73720 [A]
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Lead/copper: EPA Lead and Copper Rule sampling data
- Radon: EPA Map of Radon Zones
Updated daily.
CDC Health Data for Bison
Source: CDC PLACES (County-level estimates). Water contamination can correlate with respiratory and chronic health conditions.
Compared to National Average
Vertical line = national average. ■ Above national · ■ Below national
How Old Is Bison's Housing Stock?
With 65% of homes built before 1986, lead solder in plumbing is a potential concern. The EPA banned lead solder in 1986, but many older homes retain original plumbing.
Source: U.S. Census Bureau American Community Survey (ACS).
Housing Age Profile
Heavily weighted toward older construction, Bison's housing stock carries a median build year of 1977. That profile puts a majority of homes in the era when lead-soldered copper plumbing was standard practice.
Over half of homes in Bison were built before 1986, when lead solder was banned. Older plumbing may leach lead into drinking water, especially with corrosive water chemistry.
Source: U.S. Census Bureau ACS B25034.
Protecting Children from Lead in Bison
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.
When older housing represents 65% of the local inventory or aggregate readings approach the federal action level, an in-home check becomes the standard way to translate citywide averages into the specific reality of an individual Bison address.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Deep Dive Reports
Detailed analysis for Bison, OK