Chelsea, OK Water Safety: 95/100 (2026)
1 ZIP code · 6 water systems · Updated 2026-06-03
Although water quality varies across any metro, Chelsea's systems collectively post above-average compliance scores for OK — and documented violations are few.
How Chelsea Compares
Data: EPA SDWIS Last verified: 2026-06-03
Chelsea Water: The Quick Version
- Average lead level: 0.0043 mg/L.
- Homes built before 1986: 56% — older plumbing may contain lead solder.
- Estimated remediation: $1,800 per household.
- CDC health risk index: 14 — above typical levels.
Water Systems Serving Chelsea
With 3 utilities splitting service in Chelsea, OK, water accountability is distributed across 6 systems on the federal record.
Overview
We track water quality and home safety data for 1 ZIP code in Chelsea, Oklahoma (population ~5,787), covering 6 community water systems serving approximately 27,977 people region-wide.
No EPA violations recorded across any ZIP codes in Chelsea — an excellent indicator of water quality.
Home Safety Score
Average Home Safety Score for Chelsea: A (95/100)
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
Chelsea water systems draw from: Surface water.
Lead & Copper
- Average lead level (90th percentile): 0.0043 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 |
|---|---|---|---|
| 74016 | A | Chelsea Economic Dev. Authority | 1,964 |
All ZIP Codes in Chelsea
- 74016 [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 Chelsea
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 Chelsea's Housing Stock?
With 56% 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
Plumbing risk in older housing is defined by two eras: the pre-1970 period when lead pipes were commonly used for service lines, and the 1970-to-1986 period when lead solder remained standard in copper plumbing until the federal ban. Chelsea's median build year of 1987 lands in a range where both eras are heavily represented in the housing stock. That creates an elevated aggregate environment for plumbing-related lead exposure — one that city-level water quality averages don't capture, because the risk sits inside individual properties rather than in the distribution system.
Over half of homes in Chelsea 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.
Chelsea: Remediation Cost in Perspective
How does remediation fit within the broader financial picture for Chelsea homeowners? The equity share is moderate — large enough that treating it as a real planning consideration makes sense, and manageable enough that most homeowners have a clear path to addressing documented water and safety issues when they approach the commitment with deliberate advance budgeting rather than as an unplanned expense.
Remediation costs are moderate relative to home values in Chelsea. The estimated $1,200–$2,500 range is manageable for most homeowners but still worth budgeting for. Home values are 21% below the Oklahoma average.
Protecting Children from Lead in Chelsea
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.
Older interior plumbing shapes the local picture: 56% of Chelsea homes predate the federal solder ban, and aggregate sampling either approaches or crosses the action benchmark. That mix makes a single-home draw a standard pre-purchase or pre-occupancy step.
Sources: EPA Lead and Copper Rule, U.S. Census Bureau ACS, CDC childhood lead poisoning prevention guidelines.
Climate-Related Water Risk for Chelsea
1 FEMA flood insurance claim are on file for Chelsea, and 100% of local ZIP codes fall within federally designated flood zones — enough to put flood exposure on the planning radar, though short of the concentrated-risk threshold where treatment-system vulnerability becomes a primary consideration.
Chelsea has a moderate flood history with 1 FEMA claims averaging $22,000 per payout. 100% of ZIP codes fall within FEMA flood zones. Flood events can contaminate drinking water and overwhelm treatment systems.
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. Flood damage can add significantly to the estimated <strong>$1,800</strong> remediation cost per household.
Residents in flood-prone areas should consider flood insurance even outside FEMA zones — over 25% of flood claims come from low-to-moderate risk areas. After any flood event, test your water before drinking.
Source: FEMA National Flood Insurance Program (NFIP) claims data, FEMA flood zone designations.
Deep Dive Reports
Detailed analysis for Chelsea, OK