Pittsburg Co. RWD #11 (Kiowa)
Pittsburg Co. RWD #11 (Kiowa) (EPA ID OK3006105) in Mcalester, OK supplies surface water (rivers, lakes) to about 790 people: 11 violations since 2016, latest lead result 15.1 ppb, PFAS 1 detected.
Health-based violations since 2016: TTHM, Lead and Copper Rule Revisions. All are listed as resolved.
The 90th-percentile lead level in the latest round (Jan 2026) was above EPA's 15 ppb action level, which requires the utility to take further steps.
PFAS were detected, with PFOA and PFOS below 4.0 ppt (highest not detected).
Service area
EPA service-area boundary (state-supplied or EPA-modeled)System facts
Health-based violations
| Contaminant or rule | Health-based violations since 2016 |
|---|---|
| TTHM | 10 |
| Lead and Copper Rule Revisions | 1 |
A health-based violation means a contaminant exceeded its legal limit (MCL) or a required treatment technique was not met, as reported by the state to EPA’s SDWIS. All are listed as resolved or archived; the latest began Oct 2024.
Lead
90th-percentile lead per sampling round (90% of the homes sampled were at or below this level). Black line: EPA’s 15 ppb action level; under the Lead and Copper Rule Improvements the action level becomes 10 ppb from 2027.
PFAS
| Compound | Highest result | Samples with detection | EPA limit |
|---|---|---|---|
| PFBA | 6.4 ppt | 2 of 4 | — |
| HFPO-DA (GenX) | not detected | 0 of 4 | — |
| PFHxA | not detected | 0 of 4 | — |
| PFDA | not detected | 0 of 4 | — |
| PFOA | not detected | 0 of 4 | 4 ppt MCL |
| PFOS | not detected | 0 of 4 | 4 ppt MCL |
| PFNA | not detected | 0 of 4 | — |
| PFHxS | not detected | 0 of 4 | — |
| PFBS | not detected | 0 of 4 | — |
| PFPeA | not detected | 0 of 4 | — |
| PFHpA | not detected | 0 of 4 | — |
EPA Fifth Unregulated Contaminant Monitoring Rule (UCMR 5), samples 2023–2025; ppt = parts per trillion (ng/L). The 4.0 ppt maximum contaminant levels for PFOA and PFOS were set by EPA in 2024; water systems have until the end of the decade to comply.
ZIP codes served
ZIP codes whose center lies in this system’s service area or that the state lists for it.
What this is — and isn’t. These are records your water utility and state reported to the EPA, and the EPA’s radon map for your county. They describe the system and the area, not the water from your own tap or the air in your home. For that, read your utility’s annual Consumer Confidence Report and test: lead and radon tests are inexpensive.
Questions
Has Pittsburg Co. RWD #11 (Kiowa) had drinking water violations?
Health-based violations since 2016: TTHM, Lead and Copper Rule Revisions. All are listed as resolved.
What is the lead level in Pittsburg Co. RWD #11 (Kiowa) water?
The latest 90th-percentile lead result (Jan 2026) was 15.1 ppb. EPA’s action level is 15 ppb (10 ppb from 2027).
Does Pittsburg Co. RWD #11 (Kiowa) have PFAS in its water?
PFAS were detected, with PFOA and PFOS below 4.0 ppt (highest not detected).