Compiled by PlainCollege, College outcomes data analysis
181
Schools
Certificate
Credential Level
$54,328
National Avg Earnings
What the IPEDS & College Scorecard Data Shows for Plumbing and Related Water Supply Services
Plumbing and Related Water Supply Services is tracked across 181 U.S. postsecondary institutions in the College Scorecard field-of-study file, which links CIP code classifications from IPEDS to Treasury earnings records. This profile covers the certificate credential level specifically, because the Department of Education reports program-level outcomes separately for associate, bachelor’s, master’s, and doctoral awards. The CIP (Classification of Instructional Programs) taxonomy lets analysts roll up specialties into broader families, which is why earnings medians across schools can be compared on a common basis.
Across all reporting institutions, the mean of school-level medians is $54,328, calculated from 16 schools with published earnings data. The earnings distribution stretches from $21,656 at the low end to $106,325 at the top, with a 25th-75th percentile band between $45,385 and $60,670 around a median of $51,550. The top-reporting institution in this program is Saint Paul College at $106,325. These numbers reflect Treasury-derived wages, deferred compensation, and positive self-employment earnings four years after completion for federally aided completers who were working and not enrolled.
Variation across schools matters more than a single national figure. Completer counts and earnings cohort counts are distinct source fields, so the displayed completer count should not be assumed to be the earnings denominator. PlainCollege's debt-to-earnings ratio divides median federal debt by annual median earnings as a descriptive comparison; it is not the Department's formal gainful-employment test. Use the school-by-school table to compare reported outcomes while accounting for cohort size, suppression, program mix, and location.
NUC University accounts for 19.3% of all Plumbing and Related Water Supply Services certificate credential graduates
That dominant concentration — well above the 5% national median for largest-entity share means Plumbing and Related Water Supply Services-wide averages lean heavily toward NUC University's own figures, masking real variation among the smaller entities that make up the rest of the total. That school produced 173 graduates in the most recent cohort, anchoring a meaningful slice of national supply for this field. When one entity holds this much weight, its programmatic and budget decisions carry outsized influence over the affected population.
Plumbing and Related Water Supply Services certificate credential median earnings varies 4.9× across entities
Plumbing and Related Water Supply Services certificate credential median earnings ranges from $21,656 (lowest) to $106,325 (highest), a spread of $84,669. That ratio is among the widest observed and reflects extreme earnings stratification across institutions, graduates of the same field can earn dramatically different starting salaries depending on the school’s reputation, regional employer mix, and selectivity. Earnings are measured four years after completion using Treasury-derived records for federally aided completers who were working and not enrolled. They are descriptive early-career outcomes, not forecasts of longer-term earnings.
Plumbing and Related Water Supply Services debt-to-earnings ratio is 0.21 — well below typical (typically associated with unusually small scale or exceptionally high per-unit investment)
debt-to-earnings ratio is the simplest comparative metric but it does not capture the full picture: this ratio uses federal loan principal, not all education debt, private loans, parent PLUS loans not in the borrower’s name, and institutional debt are excluded Values this far below typical often correlate with unusually small scale or population characteristics rather than higher resource budgets per se — worth checking whether the underlying denominator is itself an outlier.
Earnings trajectory. For the 15 schools reporting both horizons, median earnings are
53% higher four years after completion than one year
after. That is the same graduates measured twice, not two different groups, so it
describes how pay develops early in the career rather than a difference between schools.
A school missing from this count reports only one horizon.
Awards and earnings come from different reference periods, so they are not a count and an
average of the same people. Awards is the number of credentials the school reported for the
latest IPEDS year; median earnings is measured four years after completion, for a separate
pooled cohort of earlier graduates. A school can therefore report zero awards in the latest
year and still have earnings on record. The earnings figure is not the awards figure’s
average, and the awards count is not the earnings sample size. Schools are ranked on the
four-year earnings figure only, so every row is compared on the same basis.
Compare beyond the CIP family
Nationwide peers by school count & four-year earnings
Cross-field programs at the same credential level nearest Plumbing and Related Water Supply Services on school-count breadth
(181 schools) and mean four-year median earnings ($54,328).
Peers exclude the same two-digit CIP family so neighborhoods are not CIP-containment siblings.
School-count peers include Registered Nursing, Nursing Administration, Nursing Research and Clinical Nursing, Veterinary/Animal Health Technologies/Technicians, Management Information Systems and Services. Earnings peers include Computer and Information Sciences, General, Legal Support Services, Industrial Production Technologies/Technicians.
Neighborhoods are forced disjoint so each axis surfaces a different set of programs.
Similar school count
Nearest programs (≥50 schools) by absolute school-count breadth, outside this CIP family.
How much do Plumbing and Related Water Supply Services graduates earn? ▼
Plumbing and Related Water Supply Services graduates earn $54,328 on average four years after completion, across the 16 of 181 schools that report earnings for this program. Earnings range from $21,656 to $106,325 depending on the institution.
Which school's Plumbing and Related Water Supply Services graduates earn the most? ▼
Saint Paul College has the highest reported median earnings for Plumbing and Related Water Supply Services graduates at $106,325, measured four years after completion in College Scorecard data. This reflects what graduates went on to earn, which depends heavily on who the school admits and which employers recruit there. It is not a figure the school pays.
What credential do you get in Plumbing and Related Water Supply Services? ▼
Plumbing and Related Water Supply Services programs typically award a Certificate credential. Earnings vary by school and credential level.
Top Schools for Plumbing and Related Water Supply Services
Closest schools offering this program – compare earnings side by side
Earnings data comes from the U.S. Department of Education College Scorecard Field of Study file retrieved in March 2026. The program metric displayed here represents federally aided completers who were working and not enrolled four years after credential completion, using Treasury-derived records published through the Scorecard. Completer counts and debt figures come from the same field-of-study snapshot; the Department refreshes components on schedules documented in its changelog, not one fixed annual date.