Blackwell Tap Water Quality Report
Blackwell's water has 5 contaminants above EPA MCLGs. We recommend using a certified water filter.
Other systems listed for Blackwell with results above guidelines: KAY COUNTY RURAL WATER DISTRICT 7 (1 above guidelines)
People Served
7,668
Health-based violations since 2020
10
BLACKWELL MUNICIPAL AUTHORITY. EPA SDWA violation data as of Q2 2026 (downloaded 2026-07-09).
Latest sample on file
Nov 2023 · BLACKWELL MUNICIPAL AUTHORITY
Utilities publish newer results in their annual water quality report (Consumer Confidence Report).
Is Blackwell Tap Water Safe to Drink?
We strongly recommend using a certified water filter to reduce exposure: Blackwell's water has 5 contaminants above EPA health-based guidelines. Check our filter recommendations below for NSF-certified options that can remove the specific contaminants found in Blackwell's water.
BLACKWELL MUNICIPAL AUTHORITY, Blackwell's water system, serves 7,668 people. 1 other system is listed for Blackwell. Each system's results are listed under its own name, never added to BLACKWELL MUNICIPAL AUTHORITY's. Water quality testing is conducted regularly and reported to the EPA. The latest sample on file for BLACKWELL MUNICIPAL AUTHORITY is from Nov 2023.
In EPA's 2023–2026 UCMR 5 testing, BLACKWELL MUNICIPAL AUTHORITY measured lithium at up to 21 µg/L, which EPA counts as above its health reference level of 10 µg/L. That level is a screening value EPA uses to decide what to study further, not a legal limit, and this result does not change this page's water-quality summary.
Boil water advisories are issued by water systems and state agencies, and they change from day to day. Boil water advisories in Oklahoma
Blackwell Water Service Areas
What these numbers actually mean for Blackwell, OK
We read Blackwell, OK’s published record and send you a short report — which findings warrant a decision, which to ignore, and what to do about it. Including when the answer is nothing.
- 5 contaminants above EPA MCLGs, 2 contaminants with an EPA health goal detected in some samples (no level on file) and 9 health-based EPA violations that began after the latest compliance result on file
- 109 results on file
- 23 PFAS compounds on record
Buying a home here? Property Water Report — $49 Emailed within one business day.
Fluoride in Blackwell's water
BLACKWELL MUNICIPAL AUTHORITY
PWSID OK1021101
No fluoride level in our data for BLACKWELL MUNICIPAL AUTHORITY. Your utility's annual water quality report (CCR) lists it.
KAY COUNTY RURAL WATER DISTRICT 7
PWSID OK3003601
No fluoride level in our data for KAY COUNTY RURAL WATER DISTRICT 7. Your utility's annual water quality report (CCR) lists it.
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Recommended Water Filters for Blackwell
Based on Blackwell's water quality data, these NSF-certified filters are recommended to remove contaminants above EPA MCLGs.
Solventum Purification Inc.
3MRO401
NSF Certified:
Daily Production
11.48 gpd
Highlights:
- NSF-58 certified reverse osmosis system
- 11.48 GPD production capacity
- Reduces total dissolved solids (TDS) for purer water
Removes 15 contaminants:
+10 more
Copper, Cryptosporidium, Fluoride, Lead, Radium 226, Radium 228, Radium, combined (-226 & -228), Selenium, Total Dissolved Solids, Turbidity
Solventum Purification Inc.
3MRO301
NSF Certified:
Daily Production
11.48 gpd
Highlights:
- NSF-58 certified reverse osmosis system
- 11.48 GPD production capacity
- Reduces total dissolved solids (TDS) for purer water
Removes 15 contaminants:
+10 more
Copper, Cryptosporidium, Fluoride, Lead, Radium 226, Radium 228, Radium, combined (-226 & -228), Selenium, Total Dissolved Solids, Turbidity
Culligan
ZeroWater
NSF Certified:
Flow Rate
1.9 gpm
Daily Production
1 gpd
Highlights:
- Compact design
- Easy to set up
- Affordable
- NSF-42, NSF-53, NSF-401 certified
Removes 19 contaminants:
+14 more
Strontium, Molybdenum, Fluoride, Uranium, Lead, Total PFAS, Chlorine, 25, Phosphorus, Bicarbonate, Calcium, Carbonate, Magnesium, Sodium
Santevia
Bath Filter
NSF Certified:
Flow Rate
0.36 gpm
Highlights:
- Organic cotton design reduces plastic used in construction
- Affordable upfront & ongoing cost
- The only bath filter that removed 100% chlorine with “normal” faster faucet flow
Removes 1 contaminants:
Verify Your Water Quality with Independent Testing
With 5 contaminants above EPA MCLGs, 2 contaminants with an EPA health goal detected in some samples (no level on file) and 9 health-based EPA violations that began after the latest compliance result on file, independent laboratory testing provides a second opinion and can track changes over time.
SimpleLab
Advanced Home Water Test
$269
Comprehensive water analysis testing over 200 contaminants including bacteria, heavy metals, and chemical compounds.
Tap Score
Haloacetic Acids (HAA9) Test
$275
Tests for disinfection byproducts formed when chlorine reacts with organic matter in water treatment.
Tap Score
Advanced Microplastics Test
$829
Cutting-edge testing for microplastics particles in drinking water using advanced laboratory techniques.
With 5 contaminants above health guidelines, you may want to explore water purification options. Learn how to make distilled water at home for applications like humidifiers, CPAP machines, and baby formula.
What Blackwell's water readings can explain
Utility-reported data for Blackwell includes a chlorine-based disinfectant — the readings behind these common tap water questions. We publish a city-level hardness figure for Blackwell, resolved from its water systems where they report one and estimated from county sampling where they do not. Each page starts with the hot-tap and cold-tap check, then shows what your own water system reported.
On a private well near Blackwell? Public-water results do not apply to private wells. See Kay County well water testing and USGS risk data — modeled arsenic, nitrate, and the tests to run.
Water softener cost and installation in Blackwell
Blackwell's tap water has an estimated 24.7 grains per gallon (422.0 mg/L, county sampling in Kay County) — very hard on the USGS scale, the range where scale on fixtures and appliances is the usual complaint.
Water softener cost for an estimated 24.7 gpg water in Blackwell — equipment and local installation labour for your ZIP code, with the sizing arithmetic shown in full. For the national picture first, read what a water softener costs — equipment, installation labour and ten-year ownership, each separated out. For Oklahoma as a whole, read water softener cost in Oklahoma — priced against the plumber wage published for the state.
Frequently Asked Questions About Blackwell Tap Water
Blackwell's water has 5 contaminants above EPA MCLGs. We strongly recommend using a certified water filter to reduce exposure to these contaminants. Check our filter recommendations below for NSF-certified options that can remove the specific contaminants found in Blackwell's water. EPA records 9 health-based violations for BLACKWELL MUNICIPAL AUTHORITY that began after its latest compliance result on file (Jul 2022): Monthly Turbidity Exceed (Enhanced SWTR) (Interim Enhanced Surface Water Treatment Rule), 4 violations, the first beginning on March 1, 2024 and the latest on July 1, 2025; Single Turbidity Exceed (Enhanced SWTR) (Interim Enhanced Surface Water Treatment Rule), 2 violations, the first beginning on March 1, 2024 and the latest on June 1, 2024; Maximum Contaminant Level Violation, Average (TTHM), 2 violations, the first beginning on October 1, 2022 and the latest on January 1, 2023; Treatment Technique (SWTR and GWR) (Surface Water Treatment Rule), which began on September 1, 2022. Every such result predates them; its later EPA UCMR 5 results (Nov 2023) screen for unregulated contaminants and cannot show the water met this standard, so this page does not call the water safe.
Spotted something off on this page?
Residents keep our data honest.
This form corrects our data; it does not reach BLACKWELL MUNICIPAL AUTHORITY. For a problem with your water now (discolored water, no water, low pressure, a leak), contact BLACKWELL MUNICIPAL AUTHORITY directly.
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