Published March 15, 2026 © MIT

ESP32 Smart Water Quality Checker

ESP32-based system for real-time water quality monitoring using pH, turbidity, and temperature sensors.

BeginnerFull instructions provided7 hours62

Things used in this project

Software apps and online services

Arduino IDE

Story

💧 Smart Water Quality Checker (IoT Water Monitoring System)

Overview

Smart Water Quality Checker एक IoT-based system है जो पानी की quality को real-time में monitor करता है।

यह system ESP32 और sensors का उपयोग करके पानी के parameters detect करता है जैसे:

✔ pH Level✔ Turbidity (water clarity)✔ Temperature✔ Water contamination

यह system smart cities, agriculture और drinking water monitoring के लिए उपयोगी है।

Things used in this project

Hardware components

ESP32 Development Board

ESP32 Development Board

pH Sensor Module

pH Sensor Module

Turbidity Sensor

Turbidity Sensor

DS18B20 Temperature Sensor

DS18B20 Temperature Sensor

LCD Display (Optional)

LCD Display (Optional)

Buzzer / Alert System

Buzzer / Alert System

Power Supply

Power Supply

Software apps and online services

Arduino IDE

Arduino IDE

ESP32 Board Package

ESP32 Board Package

WiFi Library

WiFi Library

MQTT / Firebase

MQTT / Firebase

IoT Dashboard

IoT Dashboard

🌍 1️⃣ Introduction

Water quality monitoring बहुत important है क्योंकि contaminated water health problems का कारण बन सकता है।

Common problems:

❌ Dirty water❌ Chemical contamination❌ High turbidity❌ Unsafe drinking water

इन problems को detect करने के लिए बनाया गया:

💧 Smart Water Quality Checker

यह system automatically water quality detect करता है और alerts generate कर सकता है।

💡 2️⃣ System Overview

Smart Water Quality Checker multiple sensors का उपयोग करके water parameters detect करता है।

ESP32 sensors से data read करता है और उसे process करता है।

System features:

✔ Real-time water monitoring✔ Water contamination detection✔ Smart alerts✔ IoT monitoring system

🧰 3️⃣ Required Hardware

3.1 ESP32 (Main Controller)

ESP32 system का main controller है।

यह sensors से data read करता है और WiFi के माध्यम से cloud पर भेज सकता है।

Features:

✔ Built-in WiFi✔ High processing speed✔ Multiple GPIO pins

3.2 pH Sensor Module

pH sensor water का acidity और alkalinity level measure करता है।

pH scale:

0-6 → Acidic

0-6 → Acidic

7 → Neutral

7 → Neutral

8-14 → Alkaline

8-14 → Alkaline

Drinking water के लिए ideal pH:

6.5 – 8.5

3.3 Turbidity Sensor

Turbidity sensor water clarity measure करता है।

यह detect करता है:

✔ Mud✔ Dust✔ Contamination

High turbidity मतलब water unsafe हो सकता है।

3.4 Temperature Sensor (DS18B20)

Temperature sensor water temperature measure करता है।

यह important है क्योंकि temperature water quality को affect कर सकता है।

3.5 Buzzer / Alert System

Buzzer alert generate करता है जब:

✔ Water contamination detect हो✔ pH level unsafe हो✔ Turbidity high हो

🔌 4️⃣ Circuit Diagram

Circuit diagram में ESP32 multiple sensors से connect होता है।

Sensors data collect करते हैं और system water quality monitor करता है।

🔗 5️⃣ Wiring Table

pH Sensor → ESP32

VCC → 5VGND → GNDAO → GPIO 34

Turbidity Sensor → ESP32

VCC → 5VGND → GNDSignal → GPIO 35

DS18B20 Temperature Sensor → ESP32

VCC → 3.3VGND → GNDDATA → GPIO 4

Buzzer → ESP32

Positive → GPIO 26Negative → GND

💻 6️⃣ Software Used

1️⃣ Arduino IDE2️⃣ ESP32 Board Package3️⃣ OneWire Library4️⃣ DallasTemperature Library5️⃣ IoT Dashboard

⚙️ 7️⃣ Working Logic

1️⃣ pH sensor water acidity measure करता है2️⃣ Turbidity sensor water clarity detect करता है3️⃣ Temperature sensor water temperature measure करता है4️⃣ ESP32 sensor data process करता है5️⃣ Unsafe water detect होने पर alert generate होता है

🚀 8️⃣ Key Features

✔ Real-time water quality monitoring✔ pH level detection✔ Turbidity measurement✔ Temperature monitoring✔ IoT-based alert system

🏡 9️⃣ Applications

✔ Drinking water monitoring✔ Smart cities✔ Agriculture irrigation✔ Water treatment plants✔ Environmental monitoring

📈 SEO Keywords

smart water quality monitoring systemESP32 water quality projectIoT water monitoring systemwater contamination detection systemsmart water monitoring IoT

📞 Project Support

Complete project support available.

📲 +91 9336183481

🏁 Conclusion

Smart Water Quality Checker water safety monitor करने में मदद करता है।

Benefits:

✔ Safe drinking water monitoring✔ Real-time detection✔ Smart alert system✔ IoT environmental monitoring

💧 Smart water monitoring systems future smart cities के लिए बहुत important हैं।

💧 ESP32 Smart Water Quality Checker – Complete Code

// --------------------------------------------
// Smart Water Quality Checker
// ESP32 + pH Sensor + Turbidity Sensor + DS18B20
// --------------------------------------------

#include <OneWire.h>
#include <DallasTemperature.h>

// Pin Configuration
#define PH_SENSOR_PIN 34
#define TURBIDITY_SENSOR_PIN 35
#define BUZZER_PIN 26
#define ONE_WIRE_BUS 4

// Setup temperature sensor
OneWire oneWire(ONE_WIRE_BUS);
DallasTemperature sensors(&oneWire);

// Variables
float phValue;
int turbidityValue;
float temperature;

// Thresholds
float phLow = 6.5;
float phHigh = 8.5;
int turbidityThreshold = 2000;

void setup()
{
  Serial.begin(115200);

  pinMode(BUZZER_PIN, OUTPUT);
  digitalWrite(BUZZER_PIN, LOW);

  sensors.begin();

  Serial.println("Smart Water Quality Checker Started");
}

void loop()
{

  // Read pH Sensor
  int phRaw = analogRead(PH_SENSOR_PIN);
  phValue = (phRaw / 4095.0) * 14.0;  

  // Read Turbidity Sensor
  turbidityValue = analogRead(TURBIDITY_SENSOR_PIN);

  // Read Temperature
  sensors.requestTemperatures();
  temperature = sensors.getTempCByIndex(0);

  Serial.println("-------- Water Quality Data --------");

  Serial.print("pH Level: ");
  Serial.println(phValue);

  Serial.print("Turbidity: ");
  Serial.println(turbidityValue);

  Serial.print("Temperature: ");
  Serial.println(temperature);

  // Check Water Quality
  if (phValue < phLow || phValue > phHigh)
  {
    Serial.println("⚠ Unsafe pH Level Detected");
    digitalWrite(BUZZER_PIN, HIGH);
  }
  else if (turbidityValue > turbidityThreshold)
  {
    Serial.println("⚠ Water Turbidity High");
    digitalWrite(BUZZER_PIN, HIGH);
  }
  else
  {
    Serial.println("Water Quality Normal");
    digitalWrite(BUZZER_PIN, LOW);
  }

  Serial.println("-----------------------------------");

  delay(3000);
}