Johnstown, between the Thompsons
Greeley Quality Septic Septic Service in Johnstown, CO
A fast-growing town on slow clay loam, where many older acreage systems are reaching the end.
- Greeley and nine towns within 20 miles
- Written price before any digging
- Licensed, insured local contractors
- Weld and Larimer County rules covered
Greeley Quality Septic connects homeowners in and around Johnstown with local septic crews for inspections, pumping, repairs and replacement systems. Johnstown has grown to about 20,600 people and straddles the Weld and Larimer county line, and its ground is among the slowest-draining in this service area, which shapes almost every septic job here.
A $475 inspection before buying an older acreage around Johnstown is cheap next to inheriting a failed field on slow clay, which typically means a $28,000 to $35,000 engineered replacement.
$475 to $1,275 for an inspection with a pump-out
A septic inspection around Johnstown typically starts at about $475, and runs $475 to $1,275 in total when the tank has to be pumped so the inspector can see inside it. Pumping alone typically runs $475 to $800. Replacements on this ground tend to be engineered, and a full system typically runs $28,000 to $35,000 for a three to five bedroom house.
Get a price: (970) 442-7072What failing systems look like around Johnstown
- Drains slowing down a little more each year
- Water ponding over the field for days after a storm
- A pump alarm on an engineered system
- Water returning to the tank from the field after pumping
- Sewage smell in the yard on still, warm evenings
Slow ground
Johnstown's soils are the main story. In a 25-point USDA sample around the town, only 3 points rated "not limited" for a conventional septic field, 13 rated "somewhat limited" and 9 "very limited", and slow water movement was the reason on 19 of them. The dominant soils are Nunn and Weld loams with clay-rich subsoils, and Ascalon on lighter ground.
Slow soil does not mean septic will not work. It means the field must be bigger, the effluent spread more evenly, and the system protected from solids. Many replacements here are engineered systems with a pump tank and pressure distribution, and a soils evaluation comes first.
Which county your parcel is in
Most of Johnstown is in Weld County, with part in Larimer County. On the Weld side, a repair permit is $1,100 in 2026 and there is no inspection requirement at sale. On the Larimer side, a major repair is $1,320, and a sale needs a transfer of title inspection and a county Acceptance Document. Check the parcel's county on the property record before assuming either.
Not sure what the system needs? Describe what you are seeing and get a straight answer on what it usually takes.
Call (970) 442-7072Between the Big Thompson and the Little Thompson
Johnstown sits just west of where the Little Thompson River meets the Big Thompson, with Greeley about ten miles to the east-northeast and Loveland about nine miles to the northwest. Low ground near both rivers carries a shallow water table, and Weld County requires an engineered design wherever groundwater is within four feet of the surface.
Systems around town
Weld County's permit map shows about 250 distinct septic permits within three miles of the middle of Johnstown and about 580 within five. Larimer's side is not in that count. Most are on older acreages; the new neighborhoods that made Johnstown one of the faster-growing towns on the Front Range are sewered.
Buying an older acreage
Ask for the permit on file, the last pump-out record and an inspection. On ground this slow, the age and size of the field matter more than anywhere else in the area.
Call (970) 442-7072A town named for a boy
Harvey J. Parish platted Johnstown in 1902 when the Great Western Railway came close to his homestead, and named it for his seven-year-old son, John, then in the hospital. The main street, now Parish Avenue, was first called Greeley Avenue.
Questions people ask
How much does a septic inspection cost in Johnstown?
Typically from about $475, and $475 to $1,275 when the tank also has to be pumped.
Is Johnstown in Weld County or Larimer County?
Both. Most of it is in Weld County, with part in Larimer County. The parcel's county sets the rules.
What are the signs my septic system is failing in Johnstown?
Drains slowing year by year, ponding over the field after storms, a pump alarm, and water returning to the tank after pumping.
Why do so many Johnstown septic systems need an engineer?
The clay loam soils move water slowly, and Weld County requires engineered designs for its restrictive soil types and for shallow groundwater.
How much does septic pumping cost in Johnstown?
A standard pump-out typically runs $475 to $800 for a tank up to 1,000 gallons.
Talk it through before anyone digs
Say what the house is doing, how old the system is and when the tank was last pumped. You will hear what the job usually involves, what it tends to cost, and whether it needs digging at all.
Call (970) 442-7072