CPI Meaning

What CPI Stands For on This Site

The acronym "CPI" is shared by several unrelated credentials and concepts. On cpistudy.com, and throughout this article, CPI means Certified Pump Installer, a voluntary individual certification for people who install pumps in water systems. Nothing in this article applies to any other credential that happens to share the abbreviation, so if you landed here looking for a different CPI, the facts below about fees, exam format and eligibility will not carry over.

If you want the shorter definitional versions of this topic, our pages on what CPI is and what CPI stands for cover the basics. This article goes one level deeper: it explains what the name actually promises, who stands behind it, and what the three letters require of a candidate in practice.

Who Issues the Credential and Who Tests It

The Certified Pump Installer credential is governed by the National Ground Water Association (NGWA). The exams are delivered by PSI Services, which runs the computer-based testing centers where candidates sit for them. NGWA membership is not required to earn the credential, which is worth knowing if you assumed the certification was a membership perk.

A detail that often surprises candidates: NGWA lists the same US$75 examination fee for members and non-members. Older application and FAQ material may imply a member discount, but the current examination-specific tariff takes precedence over that generic wording. For a full breakdown of what the process costs beyond exam fees, see our CPI certification cost guide.

What the Credential Covers: Seven Occupational Duties

NGWA's DACUM Research Chart for Pump Installers, developed June 12-13, 2003, organizes the occupation into seven duty headings. We use these as the seven preparation domains on this site. An important caveat: these headings are job-task competencies linked from NGWA's certification-examination page. They are not a published exam blueprint, and no percentage weights appear in the preparation sources we reviewed. NGWA's 2019 Exam Preparation Success Guide uses six preparation categories and omits the administrative duty, and reference coverage varies by examination. So treat the list below as a map of the job, not a guarantee that every duty is tested on every exam.

For a domain-by-domain walkthrough, read our complete guide to the seven CPI content areas.

How the Exam Route Works

The complete CPI route requires two examinations at minimum: the Water systems general exam, plus at least one specialty exam. The specialties are split by system size.

You must pass the required examinations within one 12-month period. Choose your specialty based on the systems you actually work on; the K and L exams are not interchangeable in content.

Format, timing and scoring

• Questions: 50 per examination, in multiple-choice format.
• Time: 60 minutes per examination.
• Passing standard: 70%.
• Delivery: computer-based, closed-book, offered year-round at PSI centers, with results available immediately.

On the minimum two-exam route, that adds up to 100 questions and two hours of testing, but be careful with how you picture it. These are two separately timed examinations, not one combined 100-question test and not an uninterrupted two-hour sitting. Our passing score guide explains what 70% means in practical terms, and the exam dates and scheduling guide covers how year-round testing changes your planning.

Eligibility Behind the Name

Passing the exams does not by itself make you a Certified Pump Installer. NGWA's eligibility requirements are what make the "Certified" part meaningful:

1. You must be at least 20 years old.
2. You need 24 consecutive months of full-time drilling and/or pump-installation experience.
3. You must provide two written professional references from people not affiliated with your current employer.
4. You must complete the application, sign the certification agreement and provide the required affidavit of legal standing.

Certification enrollment must be completed within 12 months of passing the qualifying examination, so don't let the paperwork lag behind your test date. The full checklist, including how to document your experience, is in our CPI requirements guide.

Keeping the Credential Active

Certification is not permanent. Annual maintenance requires seven continuing education points (CEPs), a renewal fee and an affidavit addressing professional standing and required licensure. One point of caution: CEPs must not be relabeled as seven classroom hours. They are a point system, and how activities earn points is defined by NGWA.

The expiration calendar

The initial certificate expires December 31 of the year following certification. Newly certified individuals earn and report their first CEPs in that following year. Renewal requirements are due December 31, and the maintenance webpage and the reverse of the renewal form accept renewal applications through January 31 without a late fee.

What a CPI Is Not

Several misreadings of the credential cause real problems:

• Not a company certification. CPI certifies an individual, not a business.
• Not a state license. It does not substitute for any license your state requires. Water well and pump work is regulated differently from state to state, and the state-specific licensing, registration and fee rules do not apply to this voluntary credential or transfer from it.
• Not a single exam. The route involves at least two separately scored examinations.
• Not a newly revised 2026 exam. NGWA's examination page retains an examination-category date of November 1, 2009, and neither that date nor the 2003 DACUM chart establishes a newly revised 2026 examination.

If you are weighing whether the voluntary credential is worth pursuing alongside any license you hold, our ROI analysis walks through the tradeoffs without inventing earnings figures.

Who Cares About the Credential

The people and organizations most likely to value a Certified Pump Installer are those who put pumps into water systems or depend on someone who does:

• Pump installation and well service contractors, who use certification to show customers that their technicians have been tested and verified.
• Drilling contractors that include pump installation in their services.
• Individual installers who want portable proof of experience and knowledge that is independent of any one employer.

Because the certification is voluntary, its value depends on how much your local market and employer care about it. We do not publish earnings numbers here, since the sources we rely on do not provide verified salary data for this credential. For qualitative context, see the CPI salary guide and the overview of CPI jobs.

Sequencing Your Preparation by Duty

Because the exams are closed-book and every question is multiple choice, your goal is retrieval from memory plus judgment. The sequence below follows the natural flow of a job, so each week builds on the last. Adjust it to your specialty exam and to how much field experience you already have.

Troubleshooting sits late in the plan because it draws on everything before it: you cannot diagnose a system well if you don't know how it should have been sized and installed. For deeper study structure, see our CPI study guide and the one-page cheat sheet. To gauge your readiness against exam-style questions, try the CPI practice tests, and read how hard the CPI exam is for a realistic picture of difficulty.

Frequently Asked Questions

For more background, our pages on CPI certification and what CPI certification is pick up where this meaning-focused overview leaves off. Always confirm current fees, deadlines and eligibility details with NGWA, since several source documents contain details that conflict or have not been updated.