The BlueDot Water Observatory is an Earth-observation-based solution that provides reliable and timely information about surface water levels across the globe. Cost-effective yet reliable solutions for monitoring water resources are needed, as ground-based monitoring networks are often too costly and, in some cases, also unreliable. Sinergise shows how using global satellite imagery available on Amazon Simple Storage Service (Amazon S3) through the AWS Public Dataset Program, combined with an efficient use of services including AWS Lambda, Amazon DynamoDB, and Amazon CloudWatch, you can carry out a global-scale project cheaper than previously possible.