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Well Water Testing in Des Moines, IA

Polk County County · 0 providers · Avg. $50 - $500

About Well Water Testing in Des Moines

Well water testing analyzes your private well water for contaminants including bacteria, nitrates, heavy metals, pH levels, and other substances that can affect health and taste. The EPA does not regulate private wells — the responsibility falls entirely on the homeowner. An estimated 23% of private wells have at least one contaminant exceeding health-based standards according to the USGS. Annual testing is recommended at minimum, with additional testing after flooding, nearby land use changes, or if you notice changes in taste, color, or odor. Basic tests cover coliform bacteria and nitrates — the two most common and dangerous contaminants in well water. Comprehensive panels add testing for lead, arsenic, manganese, iron, hardness, pH, total dissolved solids, volatile organic compounds, and pesticides depending on your region and local geology. Results typically take 5-14 business days from a certified laboratory. If contaminants are found, treatment options range from simple point-of-use filters to whole-house treatment systems depending on what is detected and at what concentration.

What Des Moines Homeowners Should Know

Local Soil Conditions: Polk County soils are dominated by deep Mollisols developed on the Des Moines Lobe — the youngest glaciated region of Iowa, covered by ice as recently as 12,000-14,000 years ago. Webster silty clay loam and Nicollet clay loam are the most common soils — both poorly to somewhat poorly drained with seasonal water tables at 0-24 inches, 30-45% clay content, and slow to moderately slow permeability. Clarion loam on upland swells is better drained with moderate permeability. Harps silty clay loam in closed depressions is very poorly drained with water at the surface much of the year. Des Moines River floodplain soils (Nodaway silt loam, Haynie fine sandy loam) are deep and moderately well-drained but subject to annual flooding.

Water Table: Webster and Nicollet soils have seasonal high water tables at 0-18 inches from December through May. Clarion soils have water tables at 18-36 inches. Harps soils have water tables at or above the surface. Polk County's extensive subsurface tile drainage infrastructure has lowered average water tables in agricultural areas by 1-2 feet but the tiles themselves intercept and concentrate lateral flow. The Raccoon River and Des Moines River maintain water tables within 3-5 feet along their corridors.

Climate Impact: Des Moines has a humid continental climate with hot, humid summers (average July high 85°F) and cold winters. Annual precipitation averages 35 inches, distributed through the year with spring peaks. Severe thunderstorms and occasional tornadoes in spring and summer can deliver intense rainfall. Winter precipitation is primarily snow and mixed precipitation (20-25 inches). Spring flooding of the Des Moines and Raccoon Rivers is a recurring event, with the 2008 floods being among the most destructive in Iowa history.

Signs You Need Well Water Testing

  • Annual testing is overdue — all private wells should be tested at least yearly
  • Water has a new or unusual taste, odor, or color
  • Recent flooding or heavy rainfall near the well
  • Nearby construction, agriculture, or land use changes
  • Household members experiencing unexplained gastrointestinal illness
  • Buying or selling a property with a private well

The Well Water Testing Process

  1. 1 Contact a certified water testing laboratory or local health department for test kits
  2. 2 Collect water samples following the lab's instructions for each test type
  3. 3 Submit samples to the lab within the required holding time (usually 24-48 hours)
  4. 4 Lab analyzes samples and compares results to EPA health-based standards
  5. 5 Receive a detailed report showing contaminant levels and whether they exceed guidelines
  6. 6 If issues are found, consult with a water treatment professional for remediation options

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Frequently Asked Questions — Des Moines

Does my Des Moines area septic system contribute to the Raccoon River nitrate problem?
Individual residential septic systems contribute a very small amount of nitrate relative to agricultural drainage, which is the dominant source. However, the cumulative effect of many on-site systems in the Raccoon River watershed is measurable and is part of Iowa DNR's watershed management planning. Properly functioning systems with adequate soil treatment substantially reduce nitrate loading compared to failing systems. Maintaining your system — pumping on schedule, fixing leaks, reducing household water use — is the most effective thing you can do to minimize your system's contribution to watershed nutrient loading.
What is a mound septic system and why do I need one in Polk County?
A mound system builds the drainfield above the native soil on an elevated bed of imported sand and gravel fill, achieving the required vertical separation from the seasonal water table or restrictive soil layer. Iowa DNR requires a minimum 2-foot separation between the drainfield bottom and the seasonal high water table for most system types. On Webster silty clay loam — which dominates most of Polk County — the water table is within 12-18 inches of the surface, leaving no room for a below-grade drainfield. Mound systems solve this by elevating the drainfield 2-4 feet above the native soil. They cost $10,000-$17,000 in the Des Moines area, reflecting material costs for imported fill sand and gravel.
How often should I pump my septic tank in the Des Moines, Iowa area?
Iowa DNR recommends pumping every 3-5 years. In Polk County, a 3-year cycle is advisable for the majority of systems, which are mound or LPP types serving the poorly drained soils of the Des Moines Lobe. Annual inspection of pump and float components is recommended for all pump-dependent systems (mound, LPP). If your household includes more people than the system was designed for, or if you have a garbage disposal (which significantly increases solids loading), pump every 2-3 years.
How much does septic pumping cost in the Des Moines, Iowa area?
Septic pumping in Polk County typically runs $225 to $375 for a standard residential tank. Iowa's moderate cost of living makes pumping costs lower than the national average. The Des Moines metro area has numerous licensed septage haulers, maintaining competitive pricing. Many Polk County pumpers offer a combined pump-out and visual inspection for $275-$400 that allows early detection of mechanical or structural issues.
My Polk County property floods occasionally — what does that mean for my septic system?
Flood events can overwhelm and damage on-site systems. If your system was submerged or received large volumes of floodwater, Iowa DNR guidance recommends pumping the tank, inspecting all components, and avoiding heavy system use until the ground has drained. Floodwater introduces sediment and pathogens into the tank and drainfield, and the saturated soil after a flood reduces drainfield capacity temporarily. For recurring flood risk, speak with your county health department about whether your system can be modified to reduce flood vulnerability, or whether relocation of components to higher ground is feasible.

Other Services in Des Moines

🌿Drain Field Repair🍳Grease Trap Pumping🔍Septic Inspection🏗️Septic System Installation🚽Septic Tank Pumping🔧Septic Repair💧Well Drilling⚙️Well Pump Repair💦Well Water Treatment

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