Tulsa County, Oklahoma: drinking water report. Tulsa County serves about 660,000 residents, with the City of Tulsa's water system drawing from Spavinaw
Tulsa County serves about 660,000 residents, with the City of Tulsa's water system drawing from Spavinaw Lake, Lake Eucha, and Oologah Lake. These reservoirs sit in the foothills of the Ozarks, fed by streams that drain agricultural and poultry farming operations across northeastern Oklahoma and northwestern Arkansas. The poultry industry's impact on watershed quality has been a source of contention – and litigation – for over two decades.
Nutrient loading from poultry litter in the Illinois River and Spavinaw Creek watersheds has elevated phosphorus levels in Tulsa's source water reservoirs. While the City of Tulsa won a landmark lawsuit against poultry companies in 2009 over watershed pollution, the underlying nutrient enrichment persists. High phosphorus fuels algal growth that increases treatment complexity and drives disinfection byproduct formation.
UCMR5 data shows low-level PFAS detections in the Tulsa system. Oklahoma does not have state-specific PFAS MCLs. According to the Oklahoma Department of Environmental Quality's 2024 compliance data, the Tulsa system met federal standards but flagged seasonal DBP variability as an ongoing management challenge.
Seasonal water quality shifts in Tulsa County track with algal growth in the source reservoirs. Summer and early fall tend to produce the highest DBP levels.
Check your water for current data in your area. Activated carbon filters address DBPs and taste. For PFAS, reverse osmosis goes further. Our water filter guide covers both scenarios. Pull your detailed report, and visit our Oklahoma page for statewide context.
Drinking water is one exposure route. These federal datasets also cover Tulsa County, OK.
The EPA places Tulsa County, OK in Zone 3 - the EPA's lowest-risk category, with a predicted average indoor radon level below 2 pCi/L. Zone maps predict an area's radon potential from geology and existing indoor readings; they say nothing about a specific house. Testing is the only way to know your own level.
54% of homes in Tulsa County, OK were built before 1980, and 12% before 1950. Residential lead paint was banned in 1978, so housing age is the strongest available proxy for lead-paint exposure. This describes the county's housing stock, not any one home.
Modelled annual fine-particle pollution (PM2.5) in Tulsa County, OK averages 9.4 µg/m³, above the EPA's annual standard of 9 µg/m³. These are CDC modelled county estimates rather than readings from a specific monitor.
How radon zones work · Air quality by county · Lead exposure guide
20 public water systems serving Tulsa County, OK have EPA lead testing on record. The reported lead sample skews toward systems that already flagged a problem, so its exceedance rate is not directly comparable with other areas. 16 water systems serving Tulsa County, OK carry a health-based EPA Safe Drinking Water Act violation.
| Most-cited violation type | Systems affected |
|---|---|
| Total Coliform Rule | 11 |
| Lead and Copper Rule Revisions | 9 |
| Total Trihalomethanes (TTHM) | 4 |
| Haloacetic Acids (HAA5) | 4 |
| Coliform (pre-TCR) | 4 |
Source: EPA Lead and Copper Rule 90th-percentile tap sampling and EPA SDWIS Safe Drinking Water Act enforcement records, aggregated from the public water systems serving this county. Figures are counts of water systems, not a test of any individual home or tap.