Olathe Tap Water Quality Report
Olathe's water has 1 contaminant above EPA MCLGs. Consider using a certified water filter for additional protection.
Other systems listed for Olathe with results above guidelines: JOHNSON CO RWD 7 (2 above guidelines), WATER DISTRICT 1 OF JOHNSON CO (2 above guidelines)
People Served
143,014
Health-based violations since 2020
0
OLATHE, CITY OF. EPA SDWA violation data as of Q2 2026 (downloaded 2026-07-09).
Latest sample on file
Aug 2024 · OLATHE, CITY OF
Utilities publish newer results in their annual water quality report (Consumer Confidence Report).
Is Olathe Tap Water Safe to Drink?
We recommend using a certified water filter for additional protection, especially for vulnerable populations like children, pregnant women, and those with compromised immune systems. Olathe's water has 1 contaminant above EPA health-based guidelines (MCLGs), while it meets federal legal limits.
OLATHE, CITY OF, Olathe's water system, serves 143,014 people. 2 other systems are listed for Olathe. Each system's results are listed under its own name, never added to OLATHE, CITY OF's. Water quality testing is conducted regularly and reported to the EPA. The latest sample on file for OLATHE, CITY OF is from Aug 2024.
In EPA's 2023–2026 UCMR 5 testing, OLATHE, CITY OF measured lithium at up to 20.7 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 Kansas
Olathe Water Service Areas
What these numbers actually mean for Olathe, KS
We read Olathe, KS’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.
- 1 contaminant above EPA MCLGs and 1 contaminant with an EPA health goal detected in some samples (no level on file)
- 106 results on file
- 23 PFAS compounds on record
Buying a home here? Property Water Report — $49 Emailed within one business day.
Get the Weekly Water Brief
One email a week on water testing, treatment, and what water-quality data means for your home.
Free forever. Unsubscribe anytime. We never share your email.
Recommended Water Filters for Olathe
Based on Olathe's water quality data, these NSF-certified filters are recommended to remove contaminants above EPA MCLGs.
AquaTru
Classic
NSF Certified:
Flow Rate
0.04 gpm
Daily Production
600 gpd
Highlights:
- Best overall contaminant reduction score
- Most performance certifications
- Lifetime warranty
- NSF-42, NSF-53, NSF-58, NSF-401 certified
Removes 23 contaminants:
+18 more
Molybdenum, Barium, Chlorine, Arsenic, 83+ contaminants, Calcium, Chloride, Copper, Magnesium, Nitrate, Phosphorus, Sodium, Sulfate, Total Dissolved Solids, Zinc, Total THMs, Chloroform, Nitrate (as N)
AquaTru
Carafe
NSF Certified:
Flow Rate
0.3 gpm
Daily Production
4 gpd
Highlights:
- Verified PFAS reduction
- Glass collection vessel
- Plug-and-play installation
- NSF-53, NSF-42, NSF-58, NSF-401, NSF-372 certified
Removes 17 contaminants:
+12 more
Arsenic, 83+ contaminants, Copper, Total THMs, Chloroform, Chloride, Sulfate, Nitrate (as N), Molybdenum, Barium, Strontium, Uranium
Waterdrop
G3 P600
NSF Certified:
Flow Rate
600 gpm
Daily Production
600 gpd
Highlights:
- Space-saving design
- Good contaminant reduction
- NSF-58 certified
Removes 4 contaminants:
Waterdrop
G3 P800
NSF Certified:
Flow Rate
800 gpm
Daily Production
800 gpd
Highlights:
- High water production rate
- Modern design
- No tank needed
- NSF-42, NSF-53, NSF-58, NSF-372 certified
Removes 15 contaminants:
+10 more
Chlorine, Copper, Manganese, Potassium, Selenium, Total Dissolved Solids, Nitrate, Chloride, Sodium, Strontium
Test Your Water Quality
Professional laboratory testing provides accurate, detailed analysis of your drinking water.
SimpleLab
Advanced Home Water Test
$269
Comprehensive water analysis testing over 200 contaminants including bacteria, heavy metals, and chemical compounds.
Tap Score
Advanced Microplastics Test
$829
Cutting-edge testing for microplastics particles in drinking water using advanced laboratory techniques.
Tap Score
Haloacetic Acids (HAA9) Test
$275
Tests for disinfection byproducts formed when chlorine reacts with organic matter in water treatment.
What Olathe's water readings can explain
Utility-reported data for Olathe includes sulfate and a chlorine-based disinfectant — the readings behind these common tap water questions. We publish a city-level hardness figure for Olathe, 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 Olathe? Public-water results do not apply to private wells. See Johnson County well water testing and USGS risk data — modeled arsenic, nitrate, and the tests to run.
Water softener cost and installation in Olathe
Olathe's tap water measures 9.2 grains per gallon (158.0 mg/L) — hard on the USGS scale, the range where scale on fixtures and appliances is the usual complaint.
Water softener cost for 9.2 gpg water in Olathe — 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 Kansas as a whole, read water softener cost in Kansas — priced against the plumber wage published for the state.
Frequently Asked Questions About Olathe Tap Water
Olathe's water has 1 contaminant above EPA MCLGs. While the water meets federal legal limits, we recommend using a certified water filter for additional protection, especially for vulnerable populations like children, pregnant women, and those with compromised immune systems.
Spotted something off on this page?
Residents keep our data honest.
This form corrects our data; it does not reach OLATHE, CITY OF. For a problem with your water now (discolored water, no water, low pressure, a leak), contact OLATHE, CITY OF directly.
Check another location
Get the Weekly Water Brief
One email a week on water testing, treatment, and what water-quality data means for your home.
One email a week. Unsubscribe anytime.