AWQI Study: 1 in 4 pH Fixes Overshoot the Target Range

The AquaDoc Water Quality Index (AWQI)
Data powered by anonymized SmartSplash water chemistry readings.

Study Summary

  • Key finding (low to high): When pH started low (<7.2) and later reached 7.2 to 7.8, 25.0% overshot into high pH (>7.8) before first landing in-range (n=260).
  • Key finding (high to low): When pH started high (>7.8) and later reached 7.2 to 7.8, 25.2% overshot into low pH (<7.2) before first landing in-range (n=309).
  • What it means: The "pH ping-pong" effect is common, and smaller steps with retesting can reduce back-and-forth swings.

Dataset

  • Coverage: 16,313 water tests across 1,502 customers
  • Date range: 2025-01-01 to 2026-02-20
  • Source: SmartSplash water chemistry readings (anonymized)

Method

We grouped tests into "episodes" to avoid long gaps distorting sequences. A new episode starts after more than 30 days without a test. Within episodes where pH started out of range but eventually reached the target range (7.2 to 7.8), we measured whether pH crossed past the target in the opposite direction before first landing in range.

  • pH in range: 7.2 to 7.8
  • Low pH start: below 7.2
  • High pH start: above 7.8

Results

Starting State Overshoot Pattern Overshoot Rate Sample (n)
pH started low (<7.2) Overshot to high (>7.8) before first landing 7.2 to 7.8 25.0% 260
pH started high (>7.8) Overshot to low (<7.2) before first landing 7.2 to 7.8 25.2% 309

What This Suggests (and What It Does Not)

Suggests: In real-world maintenance, pH adjustments often move past the intended band before settling. Using smaller correction steps and retesting after circulation may reduce these swings.

Does not prove: this does not prove a single "best" dosing method, and it does not isolate which products or behaviors caused overshoot. It describes a pattern observed across many episodes.

Limitations

  • Observational dataset from real user behavior, not a controlled dosing study.
  • We do not know exact chemical amounts added between tests.
  • Timing between tests varies, and that can influence how quickly pH appears to cross thresholds.

How to Cite This Study

AquaDoc Water Quality Index (AWQI). “AWQI Study: 1 in 4 pH Fixes Overshoot the Target Range.” Data powered by anonymized SmartSplash water chemistry readings. Dataset coverage: 16,313 tests (2025-01-01 to 2026-02-20).

FAQ

If I overshoot pH, did I mess up?
Not necessarily. Overshoot is common in real maintenance. The key is to correct in smaller steps and confirm with a follow-up test after circulation.

Should I chase pH every day?
If you are actively correcting, short-interval retesting can help you avoid big swings. Otherwise, a consistent weekly routine is often easier to maintain.

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