HCT UNIVERSITY · IRRIGATION WATER QUALITY
Your water is more than H₂O. Here is what it carries, and what to do about it.
Irrigation water carries minerals, salts, bicarbonates, sodium, chloride, and biology. With every cycle, each one either helps the site or adds another layer of stress. This page explains what is in the water, how it becomes scale, sealed soil, and tied-up nutrition, and how WaterSOLV™ conditions the water at the source so irrigation works for the crop or turf instead of against it.
For growers, turf managers, and golf course superintendents · Agriculture, turf, and landscape irrigation · Testing before treatment
WHAT WATER QUALITY MEANS
Water quality is how your water behaves once it enters the soil-water-plant system.
It is not a pH number or a lab sheet. It is whether dissolved nutrients stay soluble, how salts behave as the water evaporates, whether oxygen stays available in the profile, and whether each irrigation supports or restricts infiltration and plant response. Water can test acceptable and still behave badly in the field, which is why interpretation matters as much as the numbers.
In the field it shows up as ponding, sealing, and runoff; white crust, scale, and residue; uneven response after irrigation or fertility; and acid use that keeps climbing.
Watch: what HCT sees in problem irrigation water and how WaterSOLV™ changes it.
WHAT IS IN THE WATER
Four things in irrigation water that work against the site.
They rarely act alone: bicarbonate, sodium, chloride, and biology feed each other, so correcting a single number rarely corrects the field. Each has its own HCT University page.
WHY QUICK FIXES DON’T HOLD
Lower pH is not the same as fixing the water.
The usual answers treat a reading or a symptom while the minerals, salts, and biology keep arriving with every cycle.
SULFURIC ACID
Drops the pH, leaves the chemistry
Lines look clean for a while, then the minerals reform after evaporation into deposits that further acid does not readily redissolve. Added sulfate feeds black-layer bacteria and the acid corrodes pumps, valves, and fittings.
Sulfuric acid vs. WaterSOLV →
HOW WATERSOLV CONDITIONS THE WATER
Treat the water at the source, and every irrigation cycle starts working for you.
WaterSOLV™ is injected at the pump station during normal irrigation, through the same point an acid program uses. Instead of chasing a pH reading, it changes what the minerals and the biology do after the water leaves the emitter.
01
Keeps scale-forming minerals soluble
WATERSOLV™ CURATIVE
A buffered acid-based sequestering chemistry. It breaks apart the calcium–magnesium bicarbonate crystal structure and satisfies the charge so calcium and magnesium stay soluble and plant-available. Treated minerals dry to a fine powder instead of hard scale and go back into solution when water returns.
02
Takes the pressure off sodium and chloride
CONDITIONED WATER, DEEPER WETTING
Sodium and chloride are addressed in the water before plant uptake, and as the profile opens up, water moves deeper and more evenly. Salts stop sitting in the active root zone and leaching works again, because flushing only works when the profile can take water.
03
Clears biofilm and restores oxygen
WATERSOLV™ BC
Hydrogen peroxide with acetic acid. It penetrates and breaks down biofilm, reduces anaerobic bacterial activity, and delivers oxygen to the root zone. It biodegrades to oxygen and water, adds no nitrogen or sulfur, is corrosion-inhibited (the SDS classifies it as corrosive to skin and eyes), and is NSF/ANSI/CAN 60 listed for well cleaning.
PRODUCT VOLUME
Up to 90% less product than acid programs
Rates are set from analysis, but WaterSOLV™ runs at a fraction of the volume of continuous acid injection.
WHAT IT DOES NOT ADD
No sulfuric acid, no urea, no added nutrients
Nothing to feed black layer or push soft growth. Corrosion-inhibited; handle per the SDS.
HOW IT IS SIZED
The water sets the rate
One almond block at 372 mg/l bicarbonate called for 4.21 ppm Curative; a lighter 100 mg/l source next door called for 1.01 ppm.
WHAT THE CASE STUDIES SHOW
Difficult water, measured before and after.
VALIDATE, THEN TREAT
Start with the water. The numbers set the program.
An irrigation water analysis (bicarbonate, hardness, sodium, chloride) sets the Curative rate. A bacteria count decides whether BC belongs in the program. A soil analysis covers the profile where it is part of the problem. Send HCT your water and the symptoms you are seeing, and you will get a read on what is driving them and whether a WaterSOLV™ program fits.
KEEP LEARNING
HCT, LLC · HCT University · Irrigation Water Quality · Scottsdale, Arizona