Gardner, KS · PWSID KS2009104
Johnson Co RWD 7 lead service lines
3,253 lead or galvanized lines to replace
Johnson Co RWD 7 reported 0 lead and 3,253 galvanized-requiring-replacement service lines out of 3,378 in its inventory. That's 96% of all its lines. Another 0 (0%) are still listed as unknown material.
Ranks #5 of 300 Kansas systems with confirmed lead lines, and #155 nationally.
96% of Johnson Co RWD 7's service lines are lead or galvanized requiring replacement. That's higher than the Kansas average (8.2%) and higher than the national average (3.1%).
- Lead 0%
- Galvanized (replace) 96%
- Unknown 0%
- Non-lead 3.7%
Total service lines reported: 3,378. Reported some but not all service line types. Population served: 6,457; 3,247 connections.
Lead test results
Johnson Co RWD 7's most recent 90th-percentile lead result (Jan 2021–Dec 2023) was 2 ppb, below both the 15 ppb action level and the 10 ppb level that takes effect in 2027. This means 90% of homes sampled were at or below that level; individual homes, especially those with lead lines, can be higher.
Lead and Copper Rule 90th-percentile results reported to EPA, in parts per billion. Dashed lines: 15 ppb action level and the 10 ppb level from November 1, 2027.
Progress since 2025 Q1
Reported lead and galvanized-requiring-replacement lines went from 3,253 in 2025 Q1 to 3,253 in 2026 Q3: no change. Lines of unknown material went from 0 to 0, no change.
Quarterly counts reported to EPA. A drop usually means lines were replaced or confirmed non-lead; a rise usually means more lines were identified. Replacement progress rankings.
Lead rule violations
EPA's data lists no Lead and Copper Rule violations for Johnson Co RWD 7 since 2015. That covers testing, reporting, corrosion control and public notice requirements; it isn't a guarantee about any individual home.
Source: EPA SDWIS violation records for the Lead and Copper Rule.
Where the water comes from
Johnson Co RWD 7's main water source is purchased surface water. It buys treated water from Water District 1 of Johnson Co, Miami Co RWD 2, City of Olathe. The seller treats the water, including corrosion control that keeps lead from dissolving out of pipes, while Johnson Co RWD 7 is responsible for its own service line inventory and replacement program. It sells water to 2 other water systems: Douglas Co RWD 4, City of Edgerton.
Source: EPA SDWIS water system and facility records.
Check your own address
These counts cover the whole system. To see whether your line is lead, use the utility's address-level inventory. Utilities had to prepare one by October 16, 2024 and make it publicly accessible; systems serving more than 50,000 people must post it online.
No map yet? Do the 2-minute scratch and magnet test on the pipe where water enters your home.
Protect your drinking water now
If your line is lead, galvanized or unknown, filter water for drinking, cooking and baby formula. Use a filter certified to NSF/ANSI 53 for lead. Run cold water for a few minutes after it sits for hours, and never use hot tap water for cooking.
How to pick a lead-certified filter · How to test your water for lead
Getting the line replaced
EPA's Lead and Copper Rule Improvements require most systems to replace lead and galvanized-requiring-replacement lines by December 31, 2037. Ask Johnson Co RWD 7 whether it replaces the private side for free or with a cost share before you hire anyone. If you want it done sooner, or your utility doesn't cover your side, a licensed plumber can quote it. What replacement costs.
County pages: Lead pipes in Johnson County
Cities served
ZIP codes served
ZIP codes whose center falls inside Johnson Co RWD 7's mapped service area (EPA service area boundaries). Neighboring utilities may serve parts of the same ZIP.
660216603166061
Other water systems nearby
| System | Lead + galv. | Unknown |
|---|---|---|
| Water District 1 of Johnson Co | 249 | 3,551 |
| City of Olathe | 224 | 263 |
| City of Gardner | 0 | 0 |
| City of Desoto | 1,951 | 0 |
| City of Edgerton | 0 | 711 |
Check another water system
Questions
Does Johnson Co RWD 7 have lead pipes?
Yes. Johnson Co RWD 7 reported 0 lead service lines and 3,253 galvanized lines that must be replaced, out of 3,378 total. 0 more are of unknown material.
How do I check if my home's service line is lead?
Look up your address on Johnson Co RWD 7's official service line inventory, which utilities must make publicly available. You can also scratch the pipe where it enters your home: lead is soft, dull gray, scratches to shiny silver and does not attract a magnet.
When will Johnson Co RWD 7 replace lead service lines?
Under EPA's Lead and Copper Rule Improvements, most systems must replace lead and galvanized-requiring-replacement lines by December 31, 2037, starting from November 1, 2027. The rule is being challenged in court, so dates could change. Many utilities run free or cost-share programs now.
Has Johnson Co RWD 7 had lead violations?
EPA's data shows no Lead and Copper Rule violations since 2015 for Johnson Co RWD 7.
Which water filters remove lead?
Use a filter certified to NSF/ANSI Standard 53 for lead reduction, or NSF/ANSI 58 for reverse osmosis. Check the certification on NSF's listings, not just the box.
Embed or cite this data
Local news sites, blogs and community groups can embed this card. It updates when EPA releases new data.
Citation: Lead Pipe Map, "Johnson Co RWD 7 lead service lines," https://leadpipemap.com/ks/johnson-co-rwd-7/. Source: EPA SDWIS service line inventory, 2026 Q3. Download the full dataset on the data page.