THC Water Quality Lab | DTF Genetics

Water report

EC (mS/cm)

Alkalinity (mg/L as CaCO₃)

Hardness (mg/L as CaCO₃)

Calcium (mg/L)

Magnesium (mg/L)

Nitrogen as N (mg/L, optional)

Nitrate-N (mg/L as N, optional)

Phosphorus as P (mg/L, optional)

Potassium (mg/L, optional)

Sulfur as S (mg/L, optional)

Sulfate-S (mg/L as S, optional)

Iron (mg/L, optional)

Manganese (mg/L, optional)

Zinc (mg/L, optional)

Copper (mg/L, optional)

Boron (mg/L, optional)

Molybdenum (mg/L, optional)

Sodium (mg/L)

Chloride (mg/L)

Ion / charge-balance screening

This screening converts explicitly reported major ions to milliequivalents per liter (meq/L): Ca²⁺, Mg²⁺, Na⁺, K⁺ versus Cl⁻, nitrate-N, sulfate-S and alkalinity as CaCO₃. It does not assume total N is nitrate or total S is sulfate. Alkalinity is treated as acid-neutralizing equivalents, not as a claim that all alkalinity is bicarbonate.

—Cations meq/L

—Anions meq/L

—Charge-balance error %

—Species coverage

Cations

—

Anions

—

Bar lengths compare reported charge equivalents only. Missing species, laboratory basis, treatment state, and analytical uncertainty can make an apparently balanced or unbalanced profile incomplete.

Species	meq/L	Basis

Interpretation workflow

1. Preserve the reportKeep lab, date, source, units and sampling point.

2. Separate pH from alkalinitypH describes the current acid/base condition; alkalinity describes acid-neutralizing capacity and buffering load.

3. Read ions with ECEC reflects total ionic conductivity, not which ions are present.

4. Re-test trendsDo not make a correction from one isolated number without confirming the source and method.

Alkalinity & carbonate-system context

Alkalinity describes acid-neutralizing capacity, not the same thing as pH. For reports expressed as mg/L as CaCO₃, dividing by 50 gives milliequivalents per liter. The bicarbonate-equivalent value below is a mass-equivalent conversion only; it is not a direct measurement of bicarbonate and does not resolve carbonate species.

—Alkalinity meq/L

—HCO₃⁻ equivalent mg/L

—Reported pH

Do not use this as an acid-dose calculator. Acid requirement depends on the acid used, concentration/normality, target endpoint, source-water chemistry, temperature and measurement method. Confirm actual treatment with appropriate chemistry and safety procedures.

Record context

Water source

Sample date

Laboratory / source of report

Report / sample ID

Sampling point

Sample temperature (°C, optional)

Lab / method notes

Notes

Fertigation handoff audit
Enter or load a water report to see which chemistry fields will feed the optimizer and which remain interpretation-only context.

CSV import accepts this tool’s canonical headers plus common explicit mg/L and conductivity-unit aliases. µS/cm conductivity is converted to mS/cm; ambiguous ppm-labelled chemistry is not auto-converted. Imported chemistry remains user-supplied report data.

Supported CSV header examples

Canonical field	Accepted examples	Unit / basis
EC	`ec_ms_cm`, `Conductivity (mS/cm)`, `Conductivity (uS/cm)`	mS/cm; µS/cm is divided by 1000
Alkalinity	`alkalinity_as_caco3`, `Alkalinity (mg/L as CaCO3)`	mg/L as CaCO₃
Hardness	`hardness_as_caco3`, `Total Hardness (mg/L as CaCO3)`	mg/L as CaCO₃
Major / trace ions	`Calcium (mg/L)`, `Magnesium (mg/L)`, `Iron (mg/L)`, etc.	explicit mg/L only
Nitrate / sulfate species	`Nitrate as N (mg/L)`, `Sulfate as S (mg/L)`	mg/L on the stated elemental basis

Headers containing ppm are intentionally left unmapped because ppm is not universally interchangeable with mg/L without a stated basis and density assumption. Review unmapped headers after import.

Source history

Filter saved source

Date	Source	Lab / report	pH	EC	Alkalinity	Hardness	Actions

Filtered source summary

—Avg pH

—Avg EC

—Avg alkalinity

—Avg hardness

All saved sources.

Change from prior report

—Δ pH

—Δ EC

—Δ alkalinity

—Δ hardness

Differences are descriptive. Confirm sampling point, lab method and treatment state before interpreting a change as a true source-water shift.