Lead Pipe Map

Colorado · population 20,639

Lead pipes in Johnstown, CO

9 lead or galvanized lines to replace

Most of Johnstown (population 20,639) gets its water from Town of Johnstown. That system reported 0 lead and 9 galvanized-requiring-replacement service lines out of 7,691, with 344 more of unknown material.

0.1% of Town of Johnstown's service lines are lead or galvanized requiring replacement, lower than the Colorado average (1.2%) and lower than the national average (3.1%).

0Lead
9Galvanized, replace
344Unknown material
7,338Non-lead

Latest lead test for Town of Johnstown (2025): 1 ppb at the 90th percentile, against a 15 ppb federal action level. Full test history.

Compliance record: EPA lists 2 Lead and Copper Rule violations since 2015 for Town of Johnstown.

Water systems serving Johnstown

Water systemLeadGalv.Unknown% lead
Town of JohnstownMain system093440.1%
Little Thompson WDServes nearby areas0000%

Matched from EPA water system service area boundaries and the cities each system reports serving. Edges of the city may be served by a neighboring system; your water bill names your utility.

Check your address in Johnstown

The counts above cover the whole water system. To see whether your line is lead, look up your address on Town of Johnstown's official inventory. Utilities had to make these public by October 16, 2024.

Find the official inventory mapTown of Johnstown details

No map yet? Do the 2-minute scratch and magnet test.

Protect your drinking water

If your line is lead, galvanized or unknown, use a filter certified to NSF/ANSI 53 for lead for drinking, cooking and baby formula, and use only cold water.

Pitcher filtersCheapest start. Pick one certified to NSF/ANSI 53 for lead, such as Brita Elite, PUR Plus or ZeroWater.See pitchers Faucet-mount filtersFilters straight from the tap. Look for NSF/ANSI 53 lead reduction on the box.See faucet filters Under-sink systemsBest for families. Carbon block (NSF 53) or reverse osmosis (NSF 58) units rated for lead.See under-sink

Choosing a lead-certified filter · Testing your water · Replacement cost

Nearby cities

Check another water system

Questions

Does Johnstown, CO have lead pipes?

Yes. Town of Johnstown, which serves Johnstown, reported 0 lead and 9 galvanized-requiring-replacement service lines, plus 344 of unknown material.

Who supplies water to Johnstown?

EPA's service area maps place most of Johnstown in Town of Johnstown's service area (PWSID CO0162418). Little Thompson WD also serves parts of the city or nearby areas.

How do I check whether my Johnstown home has a lead service line?

Search your address on Town of Johnstown's service line inventory map. You can also scratch the pipe where water enters your home: lead is soft, dull gray, scratches to shiny silver and doesn't attract a magnet.

When will lead pipes in Johnstown be replaced?

EPA's Lead and Copper Rule Improvements require most systems to replace lead and galvanized-requiring-replacement lines by December 31, 2037. Ask Town of Johnstown whether your street is scheduled and whether it covers the private side.